Message-ID: <20160125160505.GA7834@sbohrermbp13-local.rgmadvisors.com>
Date:	Mon, 25 Jan 2016 10:05:05 -0600
From:	Shawn Bohrer <shawn.bohrer@...il.com>
To:	viro@...iv.linux.org.uk
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	nab@...ux-iscsi.org, gregkh@...uxfoundation.org
Subject: 3.14 stable regression don't remove from shrink list in
 select_collect()

I recently updated some machines to 3.14.58 and they reliably get soft
lockups.  Sometimes the soft lockup recovers and some times it does
not.  I've bisected this on the 3.14 stable branch and arrived at:

c214cb82cdc744225d85899fc138251527f75fff don't remove from shrink
list in select_collect()

Reverting this commit plus adding back dentry_lru_del() which was
removed later on top of 3.14.58 resolves the issue for me.  I've
included a patch at the bottom with the revert.

So far this issue has been easy to reproduce for me so I'm happy to
try other patches for further debugging or testing.  I have not yet
tried latest upstream to see if it also has the issue.  Below are the
Soft lockup messages:


[   76.423941] BUG: soft lockup - CPU#10 stuck for 23s! [systemd-udevd:3613]
[   76.538222] Modules linked in: vfat fat usb_storage 8021q mrp garp stp llc dell_rbu mpt2sas raid_class scsi_transport_sas mptctl mptbase sfc_aoe(O) ext4 jbd2 mbcache coretemp crc32c_intel aesni_intel aes_x86_64 ablk_helper cryptd glue_helper sfc(O) ptp pps_core mdio lrw joydev hwmon i2c_algo_bit bnx2 gf128mul ipmi_devintf serio_raw iTCO_wdt ses i2c_core ipmi_si ipmi_msghandler wmi enclosure iTCO_vendor_support microcode pcspkr dcdbas ioatdma ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ib_sa dca ib_mad ib_core lpc_ich mfd_core ib_addr nfsd auth_rpcgss oid_registry nfs_acl lockd sunrpc ata_generic pata_acpi ata_piix libata megaraid_sas ehci_pci ehci_hcd uhci_hcd ipv6 autofs4
[   76.538260] CPU: 10 PID: 3613 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[   76.538261] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[   76.538262] task: ffff881806e45280 ti: ffff8817823d6000 task.ti: ffff8817823d6000
[   76.538263] RIP: 0010:[<ffffffff814f901c>]  [<ffffffff814f901c>] _raw_spin_trylock+0x2c/0x40
[   76.538270] RSP: 0018:ffff8817823d7b40  EFLAGS: 00000246
[   76.538271] RAX: 00000000dd75dd75 RBX: ffff8817823d7ae8 RCX: 00000000dd76dd75
[   76.538272] RDX: 00000000dd75dd75 RSI: 0000000000000000 RDI: ffff88178509e638
[   76.538273] RBP: ffff8817823d7b40 R08: ffff88178354a1e0 R09: 0000000180220001
[   76.538274] R10: ffffffff811c9b96 R11: ffffea005e0d5280 R12: ffff880b7f097198
[   76.538275] R13: ffff8817774d2c30 R14: ffff88178354a1e0 R15: ffff88178354a1e0
[   76.538276] FS:  00007f20b4868880(0000) GS:ffff88180f2a0000(0000) knlGS:0000000000000000
[   76.538277] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   76.538278] CR2: 00007f20b61e6f58 CR3: 000000180652f000 CR4: 00000000000007e0
[   76.538279] Stack:
[   76.538280]  ffff8817823d7b70 ffffffff8116eff6 ffff880b7ac5ef80 ffff8817823d7bc0
[   76.538283]  ffff880b7ac5ef00 ffff880b7ac5ef00 ffff8817823d7ba8 ffffffff8116f459
[   76.538285]  ffff880b7ac5ef80 ffff8817823d7bc0 ffff880b7ac5ecc0 000000000000000c
[   76.538287] Call Trace:
[   76.538292]  [<ffffffff8116eff6>] dentry_kill+0x36/0x290
[   76.538294]  [<ffffffff8116f459>] shrink_dentry_list+0x79/0xd0
[   76.538296]  [<ffffffff81170364>] check_submounts_and_drop+0x74/0xa0
[   76.538301]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[   76.538306]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[   76.538307]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[   76.538311]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[   76.538313]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[   76.538315]  [<ffffffff814f7cc6>] ? __mutex_unlock_slowpath+0x16/0x40
[   76.538317]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[   76.538318]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[   76.538320]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[   76.538321]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[   76.538323]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[   76.538325]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[   76.538327]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[   76.538329]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[   76.538330]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[   76.538332]  [<ffffffff81169631>] user_path_at+0x11/0x20
[   76.538334]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[   76.538336]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[   76.538338]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[   76.538339]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[   76.538343]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[   76.538344] Code: 66 66 66 90 55 48 89 e5 8b 17 89 d0 c1 e8 10 66 39 c2 74 0b 31 c0 5d c3 0f 1f 80 00 00 00 00 8d 8a 00 00 01 00 89 d0 f0 0f b1 0f <39> d0 75 e5 b8 01 00 00 00 5d c3 66 0f 1f 84 00 00 00 00 00 66 
[  104.426665] BUG: soft lockup - CPU#10 stuck for 23s! [systemd-udevd:3613]
[  104.537859] Modules linked in: vfat fat usb_storage 8021q mrp garp stp llc dell_rbu mpt2sas raid_class scsi_transport_sas mptctl mptbase sfc_aoe(O) ext4 jbd2 mbcache coretemp crc32c_intel aesni_intel aes_x86_64 ablk_helper cryptd glue_helper sfc(O) ptp pps_core mdio lrw joydev hwmon i2c_algo_bit bnx2 gf128mul ipmi_devintf serio_raw iTCO_wdt ses i2c_core ipmi_si ipmi_msghandler wmi enclosure iTCO_vendor_support microcode pcspkr dcdbas ioatdma ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm ib_sa dca ib_mad ib_core lpc_ich mfd_core ib_addr nfsd auth_rpcgss oid_registry nfs_acl lockd sunrpc ata_generic pata_acpi ata_piix libata megaraid_sas ehci_pci ehci_hcd uhci_hcd ipv6 autofs4
[  104.537895] CPU: 10 PID: 3613 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  104.537896] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  104.537897] task: ffff881806e45280 ti: ffff8817823d6000 task.ti: ffff8817823d6000
[  104.537898] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  104.537905] RSP: 0018:ffff8817823d7b70  EFLAGS: 00000297
[  104.537907] RAX: 000000000000980a RBX: ffffffff811c9b96 RCX: 000000000000980b
[  104.537908] RDX: 000000000000980b RSI: ffff8817823d7bc0 RDI: ffff880b7ac5ef58
[  104.537909] RBP: ffff8817823d7b70 R08: ffff88178354a1e0 R09: 0000000180220001
[  104.537910] R10: ffffffff811c9b96 R11: ffffea005e0d5280 R12: ffff88178354a1e0
[  104.537911] R13: ffff8817823d7b70 R14: ffffffff811c9b96 R15: ffffea005e0d5280
[  104.537912] FS:  00007f20b4868880(0000) GS:ffff88180f2a0000(0000) knlGS:0000000000000000
[  104.537913] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  104.537914] CR2: 00007f20b61e6f58 CR3: 000000180652f000 CR4: 00000000000007e0
[  104.537915] Stack:
[  104.537916]  ffff8817823d7ba8 ffffffff8116f409 ffff880b7ac5ef80 ffff8817823d7bc0
[  104.537919]  ffff880b7ac5ecc0 000000000000000c ffff8817823d7dd0 ffff8817823d7bf0
[  104.537921]  ffffffff81170364 ffff880b7ac5ecc0 ffff880b7ac5ef80 ffff880b7ac5ef80
[  104.537923] Call Trace:
[  104.537928]  [<ffffffff8116f409>] shrink_dentry_list+0x29/0xd0
[  104.537930]  [<ffffffff81170364>] check_submounts_and_drop+0x74/0xa0
[  104.537935]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  104.537940]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  104.537942]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  104.537945]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  104.537947]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[  104.537949]  [<ffffffff814f7cc6>] ? __mutex_unlock_slowpath+0x16/0x40
[  104.537951]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  104.537952]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[  104.537954]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[  104.537956]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  104.537957]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  104.537959]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  104.537961]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  104.537963]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  104.537964]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[  104.537966]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  104.537968]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  104.537970]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  104.537972]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[  104.537973]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  104.537977]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  104.537977] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  114.815780] INFO: rcu_sched self-detected stall on CPU { 10}  (t=60001 jiffies g=3462 c=3461 q=47070)
[  114.817679] INFO: rcu_sched detected stalls on CPUs/tasks: { 10} (detected by 0, t=60002 jiffies, g=3462, c=3461, q=47070)
[  114.817680] sending NMI to all CPUs:
[  114.817682] NMI backtrace for cpu 0
[  114.817683] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.817684] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.817685] task: ffffffff81a11480 ti: ffffffff81a00000 task.ti: ffffffff81a00000
[  114.817691] RIP: 0010:[<ffffffff81031769>]  [<ffffffff81031769>] default_send_IPI_mask_sequence_phys+0x79/0x100
[  114.817691] RSP: 0018:ffff88180f203dc8  EFLAGS: 00000046
[  114.817692] RAX: ffff880c0fa00000 RBX: 000000000000a08a RCX: 0000000000000001
[  114.817692] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000000
[  114.817693] RBP: ffff88180f203e00 R08: ffffffff81acc9e0 R09: ffffffff81c86cdc
[  114.817693] R10: 0000000000005e28 R11: 0000000000020000 R12: ffffffff81acc9e0
[  114.817694] R13: 0000000000000400 R14: 0000000000000082 R15: 0000000000000002
[  114.817694] FS:  0000000000000000(0000) GS:ffff88180f200000(0000) knlGS:0000000000000000
[  114.817695] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.817696] CR2: 00007fdf4e670000 CR3: 0000000b8cf1c000 CR4: 00000000000007f0
[  114.817696] Stack:
[  114.817699]  0000002000000008 0000000000000000 0000000000002710 ffffffff81a442c0
[  114.817701]  ffffffff81acca00 ffffffff81a44380 0000000000000000 ffff88180f203e10
[  114.817703]  ffffffff81034cf7 ffff88180f203e28 ffffffff81031980 ffff88180f20c660
[  114.817703] Call Trace:
[  114.817704]  <IRQ> 
[  114.817707]  [<ffffffff81034cf7>] physflat_send_IPI_all+0x17/0x20
[  114.817709]  [<ffffffff81031980>] arch_trigger_all_cpu_backtrace+0x70/0xb0
[  114.817713]  [<ffffffff810975c9>] rcu_check_callbacks+0x639/0x660
[  114.817715]  [<ffffffff81058be7>] update_process_times+0x47/0x70
[  114.817719]  [<ffffffff810a12b9>] tick_sched_timer+0x49/0x140
[  114.817722]  [<ffffffff8106eef6>] __run_hrtimer+0x66/0x1a0
[  114.817723]  [<ffffffff810a1270>] ? tick_init_highres+0x20/0x20
[  114.817725]  [<ffffffff8106f777>] hrtimer_interrupt+0xf7/0x240
[  114.817728]  [<ffffffff81030187>] local_apic_timer_interrupt+0x37/0x60
[  114.817730]  [<ffffffff81503fbf>] smp_apic_timer_interrupt+0x3f/0x60
[  114.817733]  [<ffffffff81502c9d>] apic_timer_interrupt+0x6d/0x80
[  114.817734]  <EOI> 
[  114.817739]  [<ffffffff8100bee8>] ? mwait_idle+0x68/0xa0
[  114.817740]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.817743]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.817748]  [<ffffffff814eade7>] rest_init+0x77/0x80
[  114.817751]  [<ffffffff81ae9ef7>] start_kernel+0x3e8/0x3f3
[  114.817752]  [<ffffffff81ae9918>] ? repair_env_string+0x5c/0x5c
[  114.817754]  [<ffffffff81ae9120>] ? early_idt_handler_array+0x120/0x120
[  114.817755]  [<ffffffff81ae95ca>] x86_64_start_reservations+0x2a/0x2c
[  114.817756]  [<ffffffff81ae970a>] x86_64_start_kernel+0x13e/0x14d
[  114.817764] Code: 00 00 4c 89 e7 48 63 d2 e8 65 83 26 00 89 c2 48 63 05 88 b3 a9 00 48 39 c2 73 55 48 8b 04 d5 40 af ac 81 41 83 ff 02 0f b7 34 03 <74> 5c 8b 04 25 00 73 5f ff f6 c4 10 74 17 66 0f 1f 84 00 00 00 
[  114.817767] NMI backtrace for cpu 1
[  114.817769] CPU: 1 PID: 453 Comm: systemd-journal Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.817769] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.817770] task: ffff881806dfb180 ti: ffff881806418000 task.ti: ffff881806418000
[  114.817775] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  114.817776] RSP: 0018:ffff881806419b28  EFLAGS: 00000287
[  114.817776] RAX: 00000000000068ef RBX: ffff881806419bc0 RCX: 00000000000068f0
[  114.817777] RDX: 00000000000068f0 RSI: ffff881806419bb8 RDI: ffff880b7ac5ed18
[  114.817777] RBP: ffff881806419b28 R08: ffff881806418000 R09: 0000000000000001
[  114.817778] R10: dfcf49889020dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ecc0
[  114.817778] R13: 0000000000000001 R14: ffff881806419dd0 R15: 0000000000000001
[  114.817779] FS:  00007f47ffa05880(0000) GS:ffff880c0fa00000(0000) knlGS:0000000000000000
[  114.817780] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  114.817780] CR2: 00007f6efbc48000 CR3: 0000000b8dbb5000 CR4: 00000000000007e0
[  114.817781] Stack:
[  114.817783]  ffff881806419ba8 ffffffff8116ff2c ffffffff8116ef50 000000000120dfe0
[  114.817785]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.817786]  0000074600000000 ffffffff8116ea00 ffff881806419bb8 ffff881806419bc0
[  114.817787] Call Trace:
[  114.817790]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  114.817792]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.817793]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.817794]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.817797]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.817801]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.817802]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.817803]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.817806]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.817807]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.817808]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.817810]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.817813]  [<ffffffff81102ff0>] ? free_pages.part.70+0x40/0x50
[  114.817814]  [<ffffffff81103013>] ? free_pages+0x13/0x20
[  114.817816]  [<ffffffff811cb991>] ? kernfs_iop_put_link+0x21/0x30
[  114.817817]  [<ffffffff811639fb>] ? generic_readlink+0x7b/0x90
[  114.817818]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  114.817820]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  114.817821]  [<ffffffff8115e99f>] SYSC_newstat+0x1f/0x40
[  114.817823]  [<ffffffff811776c4>] ? mntput+0x24/0x40
[  114.817824]  [<ffffffff81162fae>] ? path_put+0x1e/0x30
[  114.817825]  [<ffffffff8115eda8>] ? SyS_readlink+0x98/0x110
[  114.817826]  [<ffffffff8115ebde>] SyS_newstat+0xe/0x10
[  114.817828]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.817837] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  114.817867] NMI backtrace for cpu 2
[  114.817868] CPU: 2 PID: 3656 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.817869] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.817870] task: ffff881806e43180 ti: ffff881807976000 task.ti: ffff881807976000
[  114.817873] RIP: 0010:[<ffffffff814f90fd>]  [<ffffffff814f90fd>] _raw_spin_lock+0x2d/0x40
[  114.817874] RSP: 0018:ffff881807977bb8  EFLAGS: 00000283
[  114.817874] RAX: 00000000000068ef RBX: ffff881807977c50 RCX: 00000000000068f4
[  114.817875] RDX: 00000000000068f4 RSI: ffff881807977c48 RDI: ffff880b7ac5ed18
[  114.817875] RBP: ffff881807977bb8 R08: ffff881807976000 R09: 0000000000000001
[  114.817876] R10: 0000000000000001 R11: 0000000000aaaaaa R12: ffff880b7ac5ecc0
[  114.817876] R13: 0000000000000001 R14: ffff881807977e60 R15: 0000000000000001
[  114.817877] FS:  00007f20b4868880(0000) GS:ffff88180f220000(0000) knlGS:0000000000000000
[  114.817878] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.817878] CR2: 00007fe27cfceee4 CR3: 0000001781ceb000 CR4: 00000000000007e0
[  114.817879] Stack:
[  114.817881]  ffff881807977c38 ffffffff8116ff2c ffffffff8116ef50 0000000001e43180
[  114.817883]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.817884]  0000074600000000 ffffffff8116ea00 ffff881807977c48 ffff881807977c50
[  114.817884] Call Trace:
[  114.817887]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  114.817888]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.817889]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.817891]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.817894]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.817897]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.817898]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.817901]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  114.817903]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.817904]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  114.817906]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.817908]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.817909]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.817910]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.817913]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  114.817915]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  114.817916]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.817925] Code: 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 0f b7 07 <66> 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 
[  114.817967] NMI backtrace for cpu 3
[  114.817968] CPU: 3 PID: 3652 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.817969] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.817969] task: ffff881806e45ac0 ti: ffff881806722000 task.ti: ffff881806722000
[  114.817972] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  114.817973] RSP: 0018:ffff881806723bb8  EFLAGS: 00000283
[  114.817973] RAX: 00000000000068ef RBX: ffff881806723c50 RCX: 00000000000068f1
[  114.817974] RDX: 00000000000068f1 RSI: ffff881806723c48 RDI: ffff880b7ac5ed18
[  114.817974] RBP: ffff881806723bb8 R08: ffff881806722000 R09: 0000000000000001
[  114.817975] R10: dfcf49809022dfe0 R11: 0000000000000001 R12: ffff880b7ac5ecc0
[  114.817975] R13: 0000000000000001 R14: ffff881806723e60 R15: 0000000000000001
[  114.817976] FS:  00007f20b4868880(0000) GS:ffff880c0fa20000(0000) knlGS:0000000000000000
[  114.817976] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.817977] CR2: 0000000001685b58 CR3: 0000001782925000 CR4: 00000000000007e0
[  114.817977] Stack:
[  114.817979]  ffff881806723c38 ffffffff8116ff2c ffffffff8116ef50 0000000001e45ac0
[  114.817981]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.817982]  0000074600000000 ffffffff8116ea00 ffff881806723c48 ffff881806723c50
[  114.817982] Call Trace:
[  114.817984]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  114.817986]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.817987]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.817988]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.817990]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.817991]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.817992]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.817995]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  114.817996]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.817998]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  114.817999]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818000]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.818001]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.818003]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.818005]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  114.818006]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  114.818008]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.818016] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  114.818067] NMI backtrace for cpu 4
[  114.818068] CPU: 4 PID: 3616 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818069] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818070] task: ffff881806e42940 ti: ffff881777bc6000 task.ti: ffff881777bc6000
[  114.818072] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  114.818073] RSP: 0018:ffff881777bc7b28  EFLAGS: 00000297
[  114.818073] RAX: 000000000000c5fd RBX: ffff880b7ac5ef00 RCX: 000000000000c5fe
[  114.818074] RDX: 000000000000c5fe RSI: ffff880b7ac5ecc0 RDI: ffff880b7ac5ef58
[  114.818074] RBP: ffff881777bc7b28 R08: ffff881777bc6000 R09: 0000000000000001
[  114.818075] R10: df9f4b848fa4dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ef90
[  114.818076] R13: ffff880b7ac5ecc0 R14: ffff880b7ac5ef58 R15: ffff880b7ac5ed60
[  114.818076] FS:  00007f20b4868880(0000) GS:ffff88180f240000(0000) knlGS:0000000000000000
[  114.818077] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818078] CR2: 00007f20b61e2000 CR3: 0000001807166000 CR4: 00000000000007e0
[  114.818078] Stack:
[  114.818080]  ffff881777bc7ba8 ffffffff8116ffb1 ffffffff8116ef50 0000000001a4dfe0
[  114.818081]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.818083]  0000074600000000 ffffffff8116ea00 ffff881777bc7bb8 ffff881777bc7bc0
[  114.818083] Call Trace:
[  114.818085]  [<ffffffff8116ffb1>] d_walk+0xe1/0x2d0
[  114.818086]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.818088]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.818089]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.818091]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.818092]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.818094]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.818095]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818096]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[  114.818098]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.818099]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[  114.818100]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[  114.818101]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818102]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.818104]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.818105]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.818106]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  114.818108]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[  114.818109]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  114.818110]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  114.818111]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  114.818113]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[  114.818114]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  114.818115]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.818124] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  114.818167] NMI backtrace for cpu 5
[  114.818169] CPU: 5 PID: 3655 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818169] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818170] task: ffff881806e47380 ti: ffff88180653c000 task.ti: ffff88180653c000
[  114.818172] RIP: 0010:[<ffffffff814f90fd>]  [<ffffffff814f90fd>] _raw_spin_lock+0x2d/0x40
[  114.818173] RSP: 0018:ffff88180653db28  EFLAGS: 00000283
[  114.818173] RAX: 00000000000068ef RBX: ffff88180653dbc0 RCX: 00000000000068f2
[  114.818174] RDX: 00000000000068f2 RSI: ffff88180653dbb8 RDI: ffff880b7ac5ed18
[  114.818174] RBP: ffff88180653db28 R08: ffff88180653c000 R09: 0000000000000001
[  114.818175] R10: dfcf49789024dfe0 R11: 0000000000001b90 R12: ffff880b7ac5ecc0
[  114.818175] R13: 0000000000000001 R14: ffff88180653ddd0 R15: 0000000000000001
[  114.818176] FS:  00007f20b4868880(0000) GS:ffff880c0fa40000(0000) knlGS:0000000000000000
[  114.818177] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818177] CR2: 0000000000459b30 CR3: 0000001795567000 CR4: 00000000000007e0
[  114.818178] Stack:
[  114.818179]  ffff88180653dba8 ffffffff8116ff2c ffffffff8116ef50 000000000124dfe0
[  114.818181]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.818183]  0000074600000000 ffffffff8116ea00 ffff88180653dbb8 ffff88180653dbc0
[  114.818183] Call Trace:
[  114.818185]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  114.818186]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.818187]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.818188]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.818190]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.818191]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.818193]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.818196]  [<ffffffff810fb79c>] ? pagecache_get_page+0x2c/0x1c0
[  114.818197]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.818198]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  114.818200]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818201]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.818202]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.818204]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.818205]  [<ffffffff814fceec>] ? __do_page_fault+0x1ec/0x520
[  114.818207]  [<ffffffff81173164>] ? evict+0x114/0x1a0
[  114.818208]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  114.818209]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  114.818210]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  114.818211]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  114.818212]  [<ffffffff814fd251>] ? do_page_fault+0x31/0x70
[  114.818214]  [<ffffffff814f9858>] ? page_fault+0x28/0x30
[  114.818215]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  114.818216]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.818225] Code: 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 0f b7 07 <66> 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 
[  114.818267] NMI backtrace for cpu 6
[  114.818269] CPU: 6 PID: 3653 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818269] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818270] task: ffff881806e42100 ti: ffff881782a50000 task.ti: ffff881782a50000
[  114.818272] RIP: 0010:[<ffffffff814f90fd>]  [<ffffffff814f90fd>] _raw_spin_lock+0x2d/0x40
[  114.818273] RSP: 0018:ffff881782a51bb8  EFLAGS: 00000287
[  114.818273] RAX: 00000000000068ef RBX: ffff881782a51c50 RCX: 00000000000068f3
[  114.818274] RDX: 00000000000068f3 RSI: ffff881782a51c48 RDI: ffff880b7ac5ed18
[  114.818275] RBP: ffff881782a51bb8 R08: ffff881782a50000 R09: 0000000000000001
[  114.818275] R10: df9f4b7c8fa6dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ecc0
[  114.818276] R13: 0000000000000001 R14: ffff881782a51e60 R15: 0000000000000001
[  114.818276] FS:  00007f20b4868880(0000) GS:ffff88180f260000(0000) knlGS:0000000000000000
[  114.818277] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818278] CR2: 00007f20b4685930 CR3: 0000001795542000 CR4: 00000000000007e0
[  114.818278] Stack:
[  114.818280]  ffff881782a51c38 ffffffff8116ff2c ffffffff8116ef50 0000000001005185
[  114.818281]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  114.818283]  0000074600000000 ffffffff8116ea00 ffff881782a51c48 ffff881782a51c50
[  114.818283] Call Trace:
[  114.818285]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  114.818286]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  114.818288]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  114.818289]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  114.818291]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.818292]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.818294]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.818295]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  114.818296]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.818298]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  114.818299]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818300]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.818302]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.818303]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.818305]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  114.818306]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  114.818307]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.818316] Code: 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 0f b7 07 <66> 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 
[  114.818368] NMI backtrace for cpu 7
[  114.818370] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818370] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818371] task: ffff881808b52100 ti: ffff881808b5c000 task.ti: ffff881808b5c000
[  114.818375] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818376] RSP: 0018:ffff881808b5ded8  EFLAGS: 00000246
[  114.818376] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818377] RDX: 0000000000000000 RSI: ffff881808b5dfd8 RDI: 0000000000000046
[  114.818377] RBP: ffff881808b5ded8 R08: 0000000000000000 R09: 0000000000000000
[  114.818378] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b5dfd8
[  114.818378] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b5dfd8
[  114.818379] FS:  0000000000000000(0000) GS:ffff880c0fa60000(0000) knlGS:0000000000000000
[  114.818380] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818380] CR2: 00007faacb05c000 CR3: 0000001782aec000 CR4: 00000000000007e0
[  114.818381] Stack:
[  114.818382]  ffff881808b5dee8 ffffffff8100c806 ffff881808b5df30 ffffffff8108d4c9
[  114.818384]  ffff881808b5dfd8 ffff881808b5dfd8 0000000000000000 0000000000000000
[  114.818385]  0000000000000000 0000000000000000 0000000000000000 ffff881808b5df48
[  114.818386] Call Trace:
[  114.818388]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818390]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818393]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818402] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818468] NMI backtrace for cpu 8
[  114.818470] CPU: 8 PID: 0 Comm: swapper/8 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818470] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818471] task: ffff881808b52940 ti: ffff881808b5e000 task.ti: ffff881808b5e000
[  114.818474] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818474] RSP: 0018:ffff881808b5fed8  EFLAGS: 00000246
[  114.818475] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818475] RDX: 0000000000000000 RSI: ffff881808b5ffd8 RDI: 0000000000000046
[  114.818476] RBP: ffff881808b5fed8 R08: 0000000000000000 R09: 0000000000000000
[  114.818476] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b5ffd8
[  114.818477] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b5ffd8
[  114.818478] FS:  0000000000000000(0000) GS:ffff88180f280000(0000) knlGS:0000000000000000
[  114.818478] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818479] CR2: 00007fa47132341c CR3: 0000001782241000 CR4: 00000000000007e0
[  114.818479] Stack:
[  114.818481]  ffff881808b5fee8 ffffffff8100c806 ffff881808b5ff30 ffffffff8108d4c9
[  114.818483]  ffff881808b5ffd8 ffff881808b5ffd8 0000000000000000 0000000000000000
[  114.818484]  0000000000000000 0000000000000000 0000000000000000 ffff881808b5ff48
[  114.818484] Call Trace:
[  114.818486]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818488]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818490]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818499] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818569] NMI backtrace for cpu 9
[  114.818570] CPU: 9 PID: 0 Comm: swapper/9 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818571] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818571] task: ffff881808b53180 ti: ffff881808b68000 task.ti: ffff881808b68000
[  114.818574] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818575] RSP: 0018:ffff881808b69ed8  EFLAGS: 00000246
[  114.818575] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818576] RDX: 0000000000000000 RSI: ffff881808b69fd8 RDI: 0000000000000046
[  114.818576] RBP: ffff881808b69ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.818577] R10: 0000000000001b93 R11: 0000000000001b90 R12: ffff881808b69fd8
[  114.818577] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b69fd8
[  114.818578] FS:  0000000000000000(0000) GS:ffff880c0fa80000(0000) knlGS:0000000000000000
[  114.818579] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818579] CR2: 00007f054bc10830 CR3: 0000000c075f2000 CR4: 00000000000007e0
[  114.818580] Stack:
[  114.818581]  ffff881808b69ee8 ffffffff8100c806 ffff881808b69f30 ffffffff8108d4c9
[  114.818583]  ffff881808b69fd8 ffff881808b69fd8 0000000000000000 0000000000000000
[  114.818584]  0000000000000000 0000000000000000 0000000000000000 ffff881808b69f48
[  114.818585] Call Trace:
[  114.818587]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818588]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818590]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818599] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818672] NMI backtrace for cpu 10
[  114.818673] CPU: 10 PID: 3613 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818674] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818675] task: ffff881806e45280 ti: ffff8817823d6000 task.ti: ffff8817823d6000
[  114.818679] RIP: 0010:[<ffffffff812e3fa6>]  [<ffffffff812e3fa6>] cfb_imageblit+0x4d6/0x510
[  114.818680] RSP: 0018:ffff88180f2a3988  EFLAGS: 00000046
[  114.818680] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000003
[  114.818681] RDX: 0000000000000023 RSI: 0000000000000000 RDI: 0000000000000001
[  114.818681] RBP: ffff88180f2a39f8 R08: ffffffff8164b760 R09: ffffc9001cf19050
[  114.818682] R10: 0000000000000001 R11: 000000000000aa00 R12: ffff881807a741f9
[  114.818683] R13: ffff881807a741f8 R14: ffffc9001cf19054 R15: ffffc9001cf19020
[  114.818683] FS:  00007f20b4868880(0000) GS:ffff88180f2a0000(0000) knlGS:0000000000000000
[  114.818684] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  114.818684] CR2: 00007f20b61e6f58 CR3: 000000180652f000 CR4: 00000000000007e0
[  114.818685] Stack:
[  114.818686]  0000000000000001 ffffffff8173dca9 ffff88180f2a39e8 ffffffff810ac870
[  114.818688]  0000000000000000 0000000000000006 000000300000001b 0000000000001400
[  114.818689]  ffffc9000000000b ffff881807a741e6 0000000000000006 ffff88180ec10000
[  114.818690] Call Trace:
[  114.818690]  <IRQ> 
[  114.818694]  [<ffffffff810ac870>] ? __sprint_symbol+0xc0/0xf0
[  114.818695]  [<ffffffff812ddcff>] bit_putcs+0x2ef/0x550
[  114.818697]  [<ffffffff812d7bc1>] ? get_color.isra.15+0x31/0x140
[  114.818698]  [<ffffffff812d8c28>] fbcon_putcs+0x128/0x160
[  114.818700]  [<ffffffff812dda10>] ? bit_cursor+0x660/0x660
[  114.818701]  [<ffffffff812d8ed3>] fbcon_redraw.isra.24+0x113/0x200
[  114.818702]  [<ffffffff812da3ab>] fbcon_scroll+0x1eb/0xd30
[  114.818705]  [<ffffffff81339ebc>] scrup+0xfc/0x110
[  114.818706]  [<ffffffff81339f50>] lf+0x80/0x90
[  114.818707]  [<ffffffff8133aab2>] vt_console_print+0x2a2/0x3f0
[  114.818709]  [<ffffffff8108aca3>] call_console_drivers.constprop.23+0x93/0xf0
[  114.818710]  [<ffffffff8108bb05>] console_unlock+0x2a5/0x3f0
[  114.818712]  [<ffffffff8108bec5>] vprintk_emit+0x275/0x4f0
[  114.818714]  [<ffffffff814f075a>] printk+0x54/0x56
[  114.818717]  [<ffffffff81097389>] rcu_check_callbacks+0x3f9/0x660
[  114.818718]  [<ffffffff81058be7>] update_process_times+0x47/0x70
[  114.818720]  [<ffffffff810a12b9>] tick_sched_timer+0x49/0x140
[  114.818721]  [<ffffffff8106eef6>] __run_hrtimer+0x66/0x1a0
[  114.818722]  [<ffffffff810a1270>] ? tick_init_highres+0x20/0x20
[  114.818723]  [<ffffffff8106f777>] hrtimer_interrupt+0xf7/0x240
[  114.818725]  [<ffffffff81030187>] local_apic_timer_interrupt+0x37/0x60
[  114.818726]  [<ffffffff81503fbf>] smp_apic_timer_interrupt+0x3f/0x60
[  114.818728]  [<ffffffff81502c9d>] apic_timer_interrupt+0x6d/0x80
[  114.818729]  <EOI> 
[  114.818730]  [<ffffffff811c9b96>] ? kernfs_put+0xe6/0x190
[  114.818731]  [<ffffffff8116e03d>] ? d_shrink_del+0x3d/0x80
[  114.818733]  [<ffffffff8116f448>] shrink_dentry_list+0x68/0xd0
[  114.818734]  [<ffffffff81170364>] check_submounts_and_drop+0x74/0xa0
[  114.818735]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  114.818737]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  114.818738]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  114.818740]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818741]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[  114.818743]  [<ffffffff814f7cc6>] ? __mutex_unlock_slowpath+0x16/0x40
[  114.818745]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  114.818746]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[  114.818747]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[  114.818748]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  114.818749]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  114.818751]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  114.818752]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  114.818753]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  114.818755]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[  114.818756]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  114.818757]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  114.818758]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  114.818759]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[  114.818761]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  114.818762]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  114.818771] Code: 00 00 00 89 5d d0 eb 30 0f 1f 44 00 00 41 0f be 04 24 4d 8d 71 04 29 f9 d3 f8 44 21 d0 41 8b 1c 80 44 21 db 89 d8 31 f0 41 89 01 <85> c9 75 06 49 83 c4 01 b1 08 4d 89 f1 83 ea 01 83 fa ff 75 cd 
[  114.818772] NMI backtrace for cpu 11
[  114.818774] CPU: 11 PID: 0 Comm: swapper/11 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818774] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818775] task: ffff881808b54200 ti: ffff881808b6c000 task.ti: ffff881808b6c000
[  114.818777] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818778] RSP: 0018:ffff881808b6ded8  EFLAGS: 00000246
[  114.818778] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818779] RDX: 0000000000000000 RSI: ffff881808b6dfd8 RDI: 0000000000000046
[  114.818779] RBP: ffff881808b6ded8 R08: 0000000000000000 R09: 0000000000000000
[  114.818780] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b6dfd8
[  114.818780] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b6dfd8
[  114.818781] FS:  0000000000000000(0000) GS:ffff880c0faa0000(0000) knlGS:0000000000000000
[  114.818782] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818782] CR2: 00007f2bd3159e26 CR3: 00000018066f3000 CR4: 00000000000007e0
[  114.818783] Stack:
[  114.818784]  ffff881808b6dee8 ffffffff8100c806 ffff881808b6df30 ffffffff8108d4c9
[  114.818786]  ffff881808b6dfd8 ffff881808b6dfd8 0000000000000000 0000000000000000
[  114.818787]  0000000000000000 0000000000000000 0000000000000000 ffff881808b6df48
[  114.818788] Call Trace:
[  114.818790]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818791]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818793]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818801] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818869] NMI backtrace for cpu 12
[  114.818870] CPU: 12 PID: 0 Comm: swapper/12 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818871] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818872] task: ffff881808b54a40 ti: ffff881808b6e000 task.ti: ffff881808b6e000
[  114.818875] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818875] RSP: 0018:ffff881808b6fed8  EFLAGS: 00000246
[  114.818876] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818877] RDX: 0000000000000000 RSI: ffff881808b6ffd8 RDI: 0000000000000046
[  114.818878] RBP: ffff881808b6fed8 R08: 0000000000000000 R09: 0000000000000000
[  114.818878] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b6ffd8
[  114.818879] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b6ffd8
[  114.818880] FS:  0000000000000000(0000) GS:ffff88180f2c0000(0000) knlGS:0000000000000000
[  114.818881] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818881] CR2: 000000305ce0e930 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.818882] Stack:
[  114.818884]  ffff881808b6fee8 ffffffff8100c806 ffff881808b6ff30 ffffffff8108d4c9
[  114.818887]  ffff881808b6ffd8 ffff881808b6ffd8 0000000000000000 0000000000000000
[  114.818889]  0000000000000000 0000000000000000 0000000000000000 ffff881808b6ff48
[  114.818889] Call Trace:
[  114.818891]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818893]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818895]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818907] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818908] NMI backtrace for cpu 13
[  114.818910] CPU: 13 PID: 0 Comm: swapper/13 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818911] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818912] task: ffff881808b55280 ti: ffff881808b70000 task.ti: ffff881808b70000
[  114.818914] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818915] RSP: 0018:ffff881808b71ed8  EFLAGS: 00000246
[  114.818916] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818916] RDX: 0000000000000000 RSI: ffff881808b71fd8 RDI: 0000000000000046
[  114.818917] RBP: ffff881808b71ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.818917] R10: 0000000000001b91 R11: 0000000000001b91 R12: ffff881808b71fd8
[  114.818918] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b71fd8
[  114.818919] FS:  0000000000000000(0000) GS:ffff880c0fac0000(0000) knlGS:0000000000000000
[  114.818920] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818921] CR2: 000000305be140b9 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.818921] Stack:
[  114.818923]  ffff881808b71ee8 ffffffff8100c806 ffff881808b71f30 ffffffff8108d4c9
[  114.818926]  ffff881808b71fd8 ffff881808b71fd8 0000000000000000 0000000000000000
[  114.818928]  0000000000000000 0000000000000000 0000000000000000 ffff881808b71f48
[  114.818928] Call Trace:
[  114.818930]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818932]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818934]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.818947] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.818969] NMI backtrace for cpu 14
[  114.818970] CPU: 14 PID: 0 Comm: swapper/14 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.818971] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.818972] task: ffff881808b55ac0 ti: ffff881808b72000 task.ti: ffff881808b72000
[  114.818975] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.818975] RSP: 0018:ffff881808b73ed8  EFLAGS: 00000246
[  114.818976] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.818977] RDX: 0000000000000000 RSI: ffff881808b73fd8 RDI: 0000000000000046
[  114.818978] RBP: ffff881808b73ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.818978] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b73fd8
[  114.818979] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b73fd8
[  114.818980] FS:  0000000000000000(0000) GS:ffff88180f2e0000(0000) knlGS:0000000000000000
[  114.818981] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.818981] CR2: 00007fdf4e670000 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.818982] Stack:
[  114.818984]  ffff881808b73ee8 ffffffff8100c806 ffff881808b73f30 ffffffff8108d4c9
[  114.818987]  ffff881808b73fd8 ffff881808b73fd8 0000000000000000 0000000000000000
[  114.818989]  0000000000000000 0000000000000000 0000000000000000 ffff881808b73f48
[  114.818989] Call Trace:
[  114.818991]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.818993]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.818995]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819008] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819069] NMI backtrace for cpu 15
[  114.819070] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819071] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819072] task: ffff881808b56300 ti: ffff881808b74000 task.ti: ffff881808b74000
[  114.819075] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819075] RSP: 0018:ffff881808b75ed8  EFLAGS: 00000246
[  114.819076] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819077] RDX: 0000000000000000 RSI: ffff881808b75fd8 RDI: 0000000000000046
[  114.819077] RBP: ffff881808b75ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819078] R10: 0000000000001b90 R11: 0000000000001b8f R12: ffff881808b75fd8
[  114.819078] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b75fd8
[  114.819079] FS:  0000000000000000(0000) GS:ffff880c0fae0000(0000) knlGS:0000000000000000
[  114.819080] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819081] CR2: 00007fea91586000 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.819081] Stack:
[  114.819084]  ffff881808b75ee8 ffffffff8100c806 ffff881808b75f30 ffffffff8108d4c9
[  114.819086]  ffff881808b75fd8 ffff881808b75fd8 0000000000000000 0000000000000000
[  114.819088]  0000000000000000 0000000000000000 0000000000000000 ffff881808b75f48
[  114.819089] Call Trace:
[  114.819091]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819093]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819095]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819107] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819169] NMI backtrace for cpu 16
[  114.819171] CPU: 16 PID: 0 Comm: swapper/16 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819172] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819172] task: ffff881808b56b40 ti: ffff881808b76000 task.ti: ffff881808b76000
[  114.819175] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819176] RSP: 0018:ffff881808b77ed8  EFLAGS: 00000246
[  114.819176] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819177] RDX: 0000000000000000 RSI: ffff881808b77fd8 RDI: 0000000000000046
[  114.819178] RBP: ffff881808b77ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819178] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b77fd8
[  114.819179] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b77fd8
[  114.819180] FS:  0000000000000000(0000) GS:ffff88180f300000(0000) knlGS:0000000000000000
[  114.819181] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819182] CR2: 000000305bebcac0 CR3: 0000000c075f2000 CR4: 00000000000007e0
[  114.819182] Stack:
[  114.819185]  ffff881808b77ee8 ffffffff8100c806 ffff881808b77f30 ffffffff8108d4c9
[  114.819187]  ffff881808b77fd8 ffff881808b77fd8 0000000000000000 0000000000000000
[  114.819189]  0000000000000000 0000000000000000 0000000000000000 ffff881808b77f48
[  114.819190] Call Trace:
[  114.819192]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819194]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819196]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819208] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819270] NMI backtrace for cpu 17
[  114.819271] CPU: 17 PID: 0 Comm: swapper/17 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819272] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819272] task: ffff881808b57380 ti: ffff881808b78000 task.ti: ffff881808b78000
[  114.819275] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819276] RSP: 0018:ffff881808b79ed8  EFLAGS: 00000246
[  114.819276] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819277] RDX: 0000000000000000 RSI: ffff881808b79fd8 RDI: 0000000000000046
[  114.819278] RBP: ffff881808b79ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819278] R10: 0000000000001b91 R11: 0000000000001b91 R12: ffff881808b79fd8
[  114.819279] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b79fd8
[  114.819280] FS:  0000000000000000(0000) GS:ffff880c0fb00000(0000) knlGS:0000000000000000
[  114.819281] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819281] CR2: 00007f20b355b220 CR3: 0000001795567000 CR4: 00000000000007e0
[  114.819282] Stack:
[  114.819284]  ffff881808b79ee8 ffffffff8100c806 ffff881808b79f30 ffffffff8108d4c9
[  114.819287]  ffff881808b79fd8 ffff881808b79fd8 0000000000000000 0000000000000000
[  114.819289]  0000000000000000 0000000000000000 0000000000000000 ffff881808b79f48
[  114.819289] Call Trace:
[  114.819291]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819293]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819295]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819307] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819369] NMI backtrace for cpu 18
[  114.819371] CPU: 18 PID: 0 Comm: swapper/18 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819372] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819373] task: ffff881808b80000 ti: ffff881808b7a000 task.ti: ffff881808b7a000
[  114.819375] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819376] RSP: 0018:ffff881808b7bed8  EFLAGS: 00000246
[  114.819377] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819377] RDX: 0000000000000000 RSI: ffff881808b7bfd8 RDI: 0000000000000046
[  114.819378] RBP: ffff881808b7bed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819379] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b7bfd8
[  114.819379] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7bfd8
[  114.819380] FS:  0000000000000000(0000) GS:ffff88180f320000(0000) knlGS:0000000000000000
[  114.819381] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819382] CR2: 00007f20b4898000 CR3: 0000001807166000 CR4: 00000000000007e0
[  114.819382] Stack:
[  114.819385]  ffff881808b7bee8 ffffffff8100c806 ffff881808b7bf30 ffffffff8108d4c9
[  114.819387]  ffff881808b7bfd8 ffff881808b7bfd8 0000000000000000 0000000000000000
[  114.819390]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7bf48
[  114.819390] Call Trace:
[  114.819392]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819394]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819396]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819409] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819469] NMI backtrace for cpu 19
[  114.819470] CPU: 19 PID: 0 Comm: swapper/19 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819471] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819471] task: ffff881808b80840 ti: ffff881808b7c000 task.ti: ffff881808b7c000
[  114.819473] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819474] RSP: 0018:ffff881808b7ded8  EFLAGS: 00000246
[  114.819474] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819475] RDX: 0000000000000000 RSI: ffff881808b7dfd8 RDI: 0000000000000046
[  114.819475] RBP: ffff881808b7ded8 R08: 0000000000000000 R09: 0000000000000000
[  114.819476] R10: 0000000000001b92 R11: 0000000000001b91 R12: ffff881808b7dfd8
[  114.819476] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7dfd8
[  114.819477] FS:  0000000000000000(0000) GS:ffff880c0fb20000(0000) knlGS:0000000000000000
[  114.819477] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819478] CR2: 00007f6f4501b140 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.819478] Stack:
[  114.819480]  ffff881808b7dee8 ffffffff8100c806 ffff881808b7df30 ffffffff8108d4c9
[  114.819481]  ffff881808b7dfd8 ffff881808b7dfd8 0000000000000000 0000000000000000
[  114.819483]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7df48
[  114.819483] Call Trace:
[  114.819484]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819486]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819487]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819495] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819569] NMI backtrace for cpu 20
[  114.819570] CPU: 20 PID: 0 Comm: swapper/20 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819571] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819572] task: ffff881808b81080 ti: ffff881808b7e000 task.ti: ffff881808b7e000
[  114.819573] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819574] RSP: 0018:ffff881808b7fed8  EFLAGS: 00000246
[  114.819574] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819575] RDX: 0000000000000000 RSI: ffff881808b7ffd8 RDI: 0000000000000046
[  114.819575] RBP: ffff881808b7fed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819576] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b7ffd8
[  114.819576] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7ffd8
[  114.819577] FS:  0000000000000000(0000) GS:ffff88180f340000(0000) knlGS:0000000000000000
[  114.819577] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819578] CR2: 00007fc77122f000 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  114.819578] Stack:
[  114.819580]  ffff881808b7fee8 ffffffff8100c806 ffff881808b7ff30 ffffffff8108d4c9
[  114.819581]  ffff881808b7ffd8 ffff881808b7ffd8 0000000000000000 0000000000000000
[  114.819583]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7ff48
[  114.819583] Call Trace:
[  114.819584]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819586]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819587]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819595] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819669] NMI backtrace for cpu 21
[  114.819670] CPU: 21 PID: 0 Comm: swapper/21 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819671] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819671] task: ffff881808b818c0 ti: ffff881808b90000 task.ti: ffff881808b90000
[  114.819673] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819674] RSP: 0018:ffff881808b91ed8  EFLAGS: 00000246
[  114.819674] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819674] RDX: 0000000000000000 RSI: ffff881808b91fd8 RDI: 0000000000000046
[  114.819675] RBP: ffff881808b91ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819675] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b91fd8
[  114.819676] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b91fd8
[  114.819676] FS:  0000000000000000(0000) GS:ffff880c0fb40000(0000) knlGS:0000000000000000
[  114.819677] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819677] CR2: 0000000000485080 CR3: 0000001782aec000 CR4: 00000000000007e0
[  114.819678] Stack:
[  114.819679]  ffff881808b91ee8 ffffffff8100c806 ffff881808b91f30 ffffffff8108d4c9
[  114.819681]  ffff881808b91fd8 ffff881808b91fd8 0000000000000000 0000000000000000
[  114.819682]  0000000000000000 0000000000000000 0000000000000000 ffff881808b91f48
[  114.819682] Call Trace:
[  114.819684]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819685]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819686]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819695] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819775] NMI backtrace for cpu 22
[  114.819781] CPU: 22 PID: 0 Comm: swapper/22 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819781] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819782] task: ffff881808b82100 ti: ffff881808b94000 task.ti: ffff881808b94000
[  114.819784] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819785] RSP: 0018:ffff881808b95ed8  EFLAGS: 00000246
[  114.819786] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819787] RDX: 0000000000000000 RSI: ffff881808b95fd8 RDI: 0000000000000046
[  114.819787] RBP: ffff881808b95ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819788] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b95fd8
[  114.819788] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b95fd8
[  114.819789] FS:  0000000000000000(0000) GS:ffff88180f360000(0000) knlGS:0000000000000000
[  114.819790] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819790] CR2: 00000000004ea300 CR3: 0000000b8dbb5000 CR4: 00000000000007e0
[  114.819790] Stack:
[  114.819793]  ffff881808b95ee8 ffffffff8100c806 ffff881808b95f30 ffffffff8108d4c9
[  114.819795]  ffff881808b95fd8 ffff881808b95fd8 0000000000000000 0000000000000000
[  114.819797]  0000000000000000 0000000000000000 0000000000000000 ffff881808b95f48
[  114.819797] Call Trace:
[  114.819799]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819801]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819803]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819814] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  114.819870] NMI backtrace for cpu 23
[  114.819871] CPU: 23 PID: 0 Comm: swapper/23 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  114.819871] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  114.819872] task: ffff881808b82940 ti: ffff881808b96000 task.ti: ffff881808b96000
[  114.819874] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  114.819874] RSP: 0018:ffff881808b97ed8  EFLAGS: 00000246
[  114.819875] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  114.819875] RDX: 0000000000000000 RSI: ffff881808b97fd8 RDI: 0000000000000046
[  114.819876] RBP: ffff881808b97ed8 R08: 0000000000000000 R09: 0000000000000000
[  114.819876] R10: 0000000000001b90 R11: 0000000000001b90 R12: ffff881808b97fd8
[  114.819876] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b97fd8
[  114.819877] FS:  0000000000000000(0000) GS:ffff880c0fb60000(0000) knlGS:0000000000000000
[  114.819878] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  114.819878] CR2: 0000000000430090 CR3: 0000000c08323000 CR4: 00000000000007e0
[  114.819878] Stack:
[  114.819880]  ffff881808b97ee8 ffffffff8100c806 ffff881808b97f30 ffffffff8108d4c9
[  114.819882]  ffff881808b97fd8 ffff881808b97fd8 0000000000000000 0000000000000000
[  114.819883]  0000000000000000 0000000000000000 0000000000000000 ffff881808b97f48
[  114.819883] Call Trace:
[  114.819885]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  114.819886]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  114.819887]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  114.819896] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.013952] sending NMI to all CPUs:
[  115.013954] NMI backtrace for cpu 0
[  115.013957] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.013958] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.013959] task: ffffffff81a11480 ti: ffffffff81a00000 task.ti: ffffffff81a00000
[  115.013960] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.013963] RSP: 0018:ffffffff81a01ee0  EFLAGS: 00000246
[  115.013964] RAX: 0000000000000000 RBX: ffffffffffffffff RCX: 0000000000000000
[  115.013965] RDX: 0000000000000000 RSI: ffffffff81a01fd8 RDI: 0000000000000046
[  115.013966] RBP: ffffffff81a01ee0 R08: 0000000000000000 R09: 0000000000000002
[  115.013966] R10: 0000000000000009 R11: 0000000000000001 R12: ffffffff81a01fd8
[  115.013967] R13: ffffffff81acc9e0 R14: ffffffff81b7c0a0 R15: ffffffff81a01fd8
[  115.013968] FS:  0000000000000000(0000) GS:ffff88180f200000(0000) knlGS:0000000000000000
[  115.013969] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.013970] CR2: 00007fdf4e670000 CR3: 0000000c08538000 CR4: 00000000000007f0
[  115.013971] Stack:
[  115.013972]  ffffffff81a01ef0 ffffffff8100c806 ffffffff81a01f38 ffffffff8108d4c9
[  115.013974]  ffffffff81a01fd8 ffffffff81a01fd8 ffffffffffffffff ffffffff81b74900
[  115.013976]  ffff88183ffce500 ffffffff81b7c0a0 ffffffff81a01fb0 ffffffff81a01f48
[  115.013978] Call Trace:
[  115.013981]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.013983]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.013985]  [<ffffffff814eade7>] rest_init+0x77/0x80
[  115.013986]  [<ffffffff81ae9ef7>] start_kernel+0x3e8/0x3f3
[  115.013988]  [<ffffffff81ae9918>] ? repair_env_string+0x5c/0x5c
[  115.013990]  [<ffffffff81ae9120>] ? early_idt_handler_array+0x120/0x120
[  115.013991]  [<ffffffff81ae95ca>] x86_64_start_reservations+0x2a/0x2c
[  115.013993]  [<ffffffff81ae970a>] x86_64_start_kernel+0x13e/0x14d
[  115.013993] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.014054] NMI backtrace for cpu 1
[  115.014057] CPU: 1 PID: 453 Comm: systemd-journal Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014058] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014059] task: ffff881806dfb180 ti: ffff881806418000 task.ti: ffff881806418000
[  115.014060] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014062] RSP: 0018:ffff881806419b28  EFLAGS: 00000287
[  115.014063] RAX: 00000000000068ef RBX: ffff881806419bc0 RCX: 00000000000068f0
[  115.014064] RDX: 00000000000068f0 RSI: ffff881806419bb8 RDI: ffff880b7ac5ed18
[  115.014065] RBP: ffff881806419b28 R08: ffff881806418000 R09: 0000000000000001
[  115.014066] R10: dfcf49889020dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ecc0
[  115.014067] R13: 0000000000000001 R14: ffff881806419dd0 R15: 0000000000000001
[  115.014068] FS:  00007f47ffa05880(0000) GS:ffff880c0fa00000(0000) knlGS:0000000000000000
[  115.014069] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  115.014070] CR2: 00007f6efbc48000 CR3: 0000000b8dbb5000 CR4: 00000000000007e0
[  115.014070] Stack:
[  115.014071]  ffff881806419ba8 ffffffff8116ff2c ffffffff8116ef50 000000000120dfe0
[  115.014074]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014076]  0000074600000000 ffffffff8116ea00 ffff881806419bb8 ffff881806419bc0
[  115.014078] Call Trace:
[  115.014079]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  115.014081]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014083]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014084]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014086]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014088]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014090]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014092]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014093]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014095]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014097]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014098]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014100]  [<ffffffff81102ff0>] ? free_pages.part.70+0x40/0x50
[  115.014102]  [<ffffffff81103013>] ? free_pages+0x13/0x20
[  115.014103]  [<ffffffff811cb991>] ? kernfs_iop_put_link+0x21/0x30
[  115.014105]  [<ffffffff811639fb>] ? generic_readlink+0x7b/0x90
[  115.014107]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  115.014108]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  115.014110]  [<ffffffff8115e99f>] SYSC_newstat+0x1f/0x40
[  115.014111]  [<ffffffff811776c4>] ? mntput+0x24/0x40
[  115.014113]  [<ffffffff81162fae>] ? path_put+0x1e/0x30
[  115.014114]  [<ffffffff8115eda8>] ? SyS_readlink+0x98/0x110
[  115.014116]  [<ffffffff8115ebde>] SyS_newstat+0xe/0x10
[  115.014118]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014118] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014154] NMI backtrace for cpu 2
[  115.014157] CPU: 2 PID: 3656 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014158] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014159] task: ffff881806e43180 ti: ffff881807976000 task.ti: ffff881807976000
[  115.014160] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014162] RSP: 0018:ffff881807977bb8  EFLAGS: 00000283
[  115.014163] RAX: 00000000000068ef RBX: ffff881807977c50 RCX: 00000000000068f4
[  115.014164] RDX: 00000000000068f4 RSI: ffff881807977c48 RDI: ffff880b7ac5ed18
[  115.014165] RBP: ffff881807977bb8 R08: ffff881807976000 R09: 0000000000000001
[  115.014166] R10: 0000000000000001 R11: 0000000000aaaaaa R12: ffff880b7ac5ecc0
[  115.014167] R13: 0000000000000001 R14: ffff881807977e60 R15: 0000000000000001
[  115.014168] FS:  00007f20b4868880(0000) GS:ffff88180f220000(0000) knlGS:0000000000000000
[  115.014169] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014170] CR2: 00007fe27cfceee4 CR3: 0000001781ceb000 CR4: 00000000000007e0
[  115.014171] Stack:
[  115.014172]  ffff881807977c38 ffffffff8116ff2c ffffffff8116ef50 0000000001e43180
[  115.014174]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014176]  0000074600000000 ffffffff8116ea00 ffff881807977c48 ffff881807977c50
[  115.014178] Call Trace:
[  115.014180]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  115.014182]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014183]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014185]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014187]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014189]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014191]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014192]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  115.014194]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014196]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  115.014198]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014200]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014201]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014203]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014205]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  115.014207]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  115.014209]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014209] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014255] NMI backtrace for cpu 3
[  115.014257] CPU: 3 PID: 3652 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014258] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014259] task: ffff881806e45ac0 ti: ffff881806722000 task.ti: ffff881806722000
[  115.014260] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014262] RSP: 0018:ffff881806723bb8  EFLAGS: 00000283
[  115.014263] RAX: 00000000000068ef RBX: ffff881806723c50 RCX: 00000000000068f1
[  115.014264] RDX: 00000000000068f1 RSI: ffff881806723c48 RDI: ffff880b7ac5ed18
[  115.014265] RBP: ffff881806723bb8 R08: ffff881806722000 R09: 0000000000000001
[  115.014266] R10: dfcf49809022dfe0 R11: 0000000000000001 R12: ffff880b7ac5ecc0
[  115.014266] R13: 0000000000000001 R14: ffff881806723e60 R15: 0000000000000001
[  115.014268] FS:  00007f20b4868880(0000) GS:ffff880c0fa20000(0000) knlGS:0000000000000000
[  115.014269] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014269] CR2: 0000000001685b58 CR3: 0000001782925000 CR4: 00000000000007e0
[  115.014270] Stack:
[  115.014271]  ffff881806723c38 ffffffff8116ff2c ffffffff8116ef50 0000000001e45ac0
[  115.014273]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014275]  0000074600000000 ffffffff8116ea00 ffff881806723c48 ffff881806723c50
[  115.014277] Call Trace:
[  115.014279]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  115.014281]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014282]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014284]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014286]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014288]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014289]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014291]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  115.014293]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014294]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  115.014296]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014298]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014300]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014301]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014303]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  115.014305]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  115.014307]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014307] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014355] NMI backtrace for cpu 4
[  115.014357] CPU: 4 PID: 3616 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014358] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014359] task: ffff881806e42940 ti: ffff881777bc6000 task.ti: ffff881777bc6000
[  115.014360] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014362] RSP: 0018:ffff881777bc7b28  EFLAGS: 00000297
[  115.014363] RAX: 000000000000c5fd RBX: ffff880b7ac5ef00 RCX: 000000000000c5fe
[  115.014364] RDX: 000000000000c5fe RSI: ffff880b7ac5ecc0 RDI: ffff880b7ac5ef58
[  115.014365] RBP: ffff881777bc7b28 R08: ffff881777bc6000 R09: 0000000000000001
[  115.014366] R10: df9f4b848fa4dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ef90
[  115.014367] R13: ffff880b7ac5ecc0 R14: ffff880b7ac5ef58 R15: ffff880b7ac5ed60
[  115.014369] FS:  00007f20b4868880(0000) GS:ffff88180f240000(0000) knlGS:0000000000000000
[  115.014370] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014371] CR2: 00007f20b61e2000 CR3: 0000001807166000 CR4: 00000000000007e0
[  115.014371] Stack:
[  115.014372]  ffff881777bc7ba8 ffffffff8116ffb1 ffffffff8116ef50 0000000001a4dfe0
[  115.014374]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014377]  0000074600000000 ffffffff8116ea00 ffff881777bc7bb8 ffff881777bc7bc0
[  115.014379] Call Trace:
[  115.014380]  [<ffffffff8116ffb1>] d_walk+0xe1/0x2d0
[  115.014382]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014384]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014385]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014387]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014389]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014391]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014393]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014395]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[  115.014397]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014398]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[  115.014400]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[  115.014402]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014403]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014405]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014407]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014409]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  115.014411]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[  115.014412]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  115.014414]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  115.014415]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  115.014417]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[  115.014419]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  115.014421]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014421] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014455] NMI backtrace for cpu 5
[  115.014457] CPU: 5 PID: 3655 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014458] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014459] task: ffff881806e47380 ti: ffff88180653c000 task.ti: ffff88180653c000
[  115.014460] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014462] RSP: 0018:ffff88180653db28  EFLAGS: 00000283
[  115.014463] RAX: 00000000000068ef RBX: ffff88180653dbc0 RCX: 00000000000068f2
[  115.014464] RDX: 00000000000068f2 RSI: ffff88180653dbb8 RDI: ffff880b7ac5ed18
[  115.014465] RBP: ffff88180653db28 R08: ffff88180653c000 R09: 0000000000000001
[  115.014466] R10: dfcf49789024dfe0 R11: 0000000000001b90 R12: ffff880b7ac5ecc0
[  115.014467] R13: 0000000000000001 R14: ffff88180653ddd0 R15: 0000000000000001
[  115.014468] FS:  00007f20b4868880(0000) GS:ffff880c0fa40000(0000) knlGS:0000000000000000
[  115.014469] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014470] CR2: 0000000000459b30 CR3: 0000001795567000 CR4: 00000000000007e0
[  115.014471] Stack:
[  115.014471]  ffff88180653dba8 ffffffff8116ff2c ffffffff8116ef50 000000000124dfe0
[  115.014474]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014476]  0000074600000000 ffffffff8116ea00 ffff88180653dbb8 ffff88180653dbc0
[  115.014478] Call Trace:
[  115.014479]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  115.014481]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014483]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014484]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014486]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014488]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014490]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014491]  [<ffffffff810fb79c>] ? pagecache_get_page+0x2c/0x1c0
[  115.014493]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014495]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  115.014497]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014498]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014500]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014502]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014503]  [<ffffffff814fceec>] ? __do_page_fault+0x1ec/0x520
[  115.014505]  [<ffffffff81173164>] ? evict+0x114/0x1a0
[  115.014507]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  115.014508]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  115.014510]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  115.014511]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  115.014513]  [<ffffffff814fd251>] ? do_page_fault+0x31/0x70
[  115.014515]  [<ffffffff814f9858>] ? page_fault+0x28/0x30
[  115.014516]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  115.014518]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014519] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014555] NMI backtrace for cpu 6
[  115.014557] CPU: 6 PID: 3653 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014558] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014559] task: ffff881806e42100 ti: ffff881782a50000 task.ti: ffff881782a50000
[  115.014560] RIP: 0010:[<ffffffff814f90fa>]  [<ffffffff814f90fa>] _raw_spin_lock+0x2a/0x40
[  115.014562] RSP: 0018:ffff881782a51bb8  EFLAGS: 00000287
[  115.014563] RAX: 00000000000068ef RBX: ffff881782a51c50 RCX: 00000000000068f3
[  115.014564] RDX: 00000000000068f3 RSI: ffff881782a51c48 RDI: ffff880b7ac5ed18
[  115.014565] RBP: ffff881782a51bb8 R08: ffff881782a50000 R09: 0000000000000001
[  115.014566] R10: df9f4b7c8fa6dfe0 R11: 00000000ffffffff R12: ffff880b7ac5ecc0
[  115.014567] R13: 0000000000000001 R14: ffff881782a51e60 R15: 0000000000000001
[  115.014568] FS:  00007f20b4868880(0000) GS:ffff88180f260000(0000) knlGS:0000000000000000
[  115.014569] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014570] CR2: 00007f20b4685930 CR3: 0000001795542000 CR4: 00000000000007e0
[  115.014571] Stack:
[  115.014571]  ffff881782a51c38 ffffffff8116ff2c ffffffff8116ef50 0000000001005185
[  115.014574]  ffff880b7ac5ed18 ffff880b7ac5ed18 ffff880b7ac5ecc0 ffff880b7ac5ed60
[  115.014576]  0000074600000000 ffffffff8116ea00 ffff881782a51c48 ffff881782a51c50
[  115.014578] Call Trace:
[  115.014580]  [<ffffffff8116ff2c>] d_walk+0x5c/0x2d0
[  115.014581]  [<ffffffff8116ef50>] ? __d_drop+0xb0/0xb0
[  115.014583]  [<ffffffff8116ea00>] ? select_collect+0xb0/0xb0
[  115.014585]  [<ffffffff81170352>] check_submounts_and_drop+0x62/0xa0
[  115.014586]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.014588]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.014590]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.014592]  [<ffffffff811216d1>] ? __do_fault+0x3c1/0x4d0
[  115.014593]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.014595]  [<ffffffff81120e5c>] ? tlb_flush_mmu.part.71+0x4c/0x90
[  115.014597]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.014599]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.014600]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.014602]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.014604]  [<ffffffff8112b29f>] ? do_munmap+0x29f/0x3b0
[  115.014606]  [<ffffffff8115ed5c>] SyS_readlink+0x4c/0x110
[  115.014608]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.014609] Code: 00 66 66 66 66 90 55 48 89 e5 b8 00 00 01 00 f0 0f c1 07 89 c2 c1 ea 10 66 39 c2 75 02 5d c3 0f b7 07 89 d1 66 39 d0 74 f4 f3 90 <0f> b7 07 66 39 c8 75 f6 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 
[  115.014655] NMI backtrace for cpu 7
[  115.014657] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014658] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014660] task: ffff881808b52100 ti: ffff881808b5c000 task.ti: ffff881808b5c000
[  115.014660] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.014663] RSP: 0018:ffff881808b5ded8  EFLAGS: 00000246
[  115.014664] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.014664] RDX: 0000000000000000 RSI: ffff881808b5dfd8 RDI: 0000000000000046
[  115.014665] RBP: ffff881808b5ded8 R08: 0000000000000000 R09: 0000000000000000
[  115.014666] R10: 0000000000001b90 R11: 0000000000001b90 R12: ffff881808b5dfd8
[  115.014667] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b5dfd8
[  115.014668] FS:  0000000000000000(0000) GS:ffff880c0fa60000(0000) knlGS:0000000000000000
[  115.014669] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014670] CR2: 00007faacb05c000 CR3: 0000000c080ca000 CR4: 00000000000007e0
[  115.014671] Stack:
[  115.014671]  ffff881808b5dee8 ffffffff8100c806 ffff881808b5df30 ffffffff8108d4c9
[  115.014673]  ffff881808b5dfd8 ffff881808b5dfd8 0000000000000000 0000000000000000
[  115.014675]  0000000000000000 0000000000000000 0000000000000000 ffff881808b5df48
[  115.014678] Call Trace:
[  115.014680]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.014681]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.014683]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.014684] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.014755] NMI backtrace for cpu 8
[  115.014757] CPU: 8 PID: 0 Comm: swapper/8 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014758] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014759] task: ffff881808b52940 ti: ffff881808b5e000 task.ti: ffff881808b5e000
[  115.014760] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.014763] RSP: 0018:ffff881808b5fed8  EFLAGS: 00000246
[  115.014764] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.014765] RDX: 0000000000000000 RSI: ffff881808b5ffd8 RDI: 0000000000000046
[  115.014766] RBP: ffff881808b5fed8 R08: 0000000000000000 R09: 0000000000000000
[  115.014766] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b5ffd8
[  115.014767] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b5ffd8
[  115.014769] FS:  0000000000000000(0000) GS:ffff88180f280000(0000) knlGS:0000000000000000
[  115.014770] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014771] CR2: 00007fa47132341c CR3: 0000001782241000 CR4: 00000000000007e0
[  115.014771] Stack:
[  115.014772]  ffff881808b5fee8 ffffffff8100c806 ffff881808b5ff30 ffffffff8108d4c9
[  115.014774]  ffff881808b5ffd8 ffff881808b5ffd8 0000000000000000 0000000000000000
[  115.014776]  0000000000000000 0000000000000000 0000000000000000 ffff881808b5ff48
[  115.014778] Call Trace:
[  115.014780]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.014782]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.014784]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.014785] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.014855] NMI backtrace for cpu 9
[  115.014862] CPU: 9 PID: 0 Comm: swapper/9 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014868] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014873] task: ffff881808b53180 ti: ffff881808b68000 task.ti: ffff881808b68000
[  115.014878] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.014887] RSP: 0018:ffff881808b69ed8  EFLAGS: 00000246
[  115.014891] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.014892] RDX: 0000000000000000 RSI: ffff881808b69fd8 RDI: 0000000000000046
[  115.014893] RBP: ffff881808b69ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.014894] R10: 0000000000001b90 R11: 0000000000001b90 R12: ffff881808b69fd8
[  115.014895] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b69fd8
[  115.014896] FS:  0000000000000000(0000) GS:ffff880c0fa80000(0000) knlGS:0000000000000000
[  115.014897] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.014898] CR2: 00007f054bc10830 CR3: 0000000c075f2000 CR4: 00000000000007e0
[  115.014898] Stack:
[  115.014899]  ffff881808b69ee8 ffffffff8100c806 ffff881808b69f30 ffffffff8108d4c9
[  115.014901]  ffff881808b69fd8 ffff881808b69fd8 0000000000000000 0000000000000000
[  115.014903]  0000000000000000 0000000000000000 0000000000000000 ffff881808b69f48
[  115.014905] Call Trace:
[  115.014907]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.014909]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.014911]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.014912] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.014955] NMI backtrace for cpu 10
[  115.014959] CPU: 10 PID: 3613 Comm: systemd-udevd Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.014963] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.014966] task: ffff881806e45280 ti: ffff8817823d6000 task.ti: ffff8817823d6000
[  115.014969] RIP: 0010:[<ffffffff8100a880>]  [<ffffffff8100a880>] native_read_tsc+0x0/0x20
[  115.014976] RSP: 0018:ffff88180f2a3d68  EFLAGS: 00000046
[  115.014980] RAX: 000000000000000a RBX: 000000001a5618ea RCX: 000000000000000b
[  115.014984] RDX: 000000001a561910 RSI: 0000000000000014 RDI: 00000000000512f3
[  115.014987] RBP: ffff88180f2a3d88 R08: ffffffff81acc9e0 R09: 000000000000079d
[  115.014991] R10: 0000000000000000 R11: ffff88180f2a3b5e R12: 00000000000512f3
[  115.014994] R13: 000000000000000a R14: 0000000000000082 R15: 0000000000000002
[  115.014998] FS:  00007f20b4868880(0000) GS:ffff88180f2a0000(0000) knlGS:0000000000000000
[  115.015001] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  115.015005] CR2: 00007f20b61e6f58 CR3: 000000180652f000 CR4: 00000000000007e0
[  115.015008] Stack:
[  115.015011]  ffffffff8129417a 00000000000003e9 0000000000001000 0000000000000400
[  115.015019]  ffff88180f2a3d98 ffffffff812940c8 ffff88180f2a3db8 ffffffff810303ba
[  115.015021]  000000000000a08a ffffffff81acc9e0 ffff88180f2a3e00 ffffffff810317db
[  115.015023] Call Trace:
[  115.015024]  <IRQ> 
[  115.015025]  [<ffffffff8129417a>] ? delay_tsc+0x4a/0x80
[  115.015031]  [<ffffffff812940c8>] __const_udelay+0x28/0x30
[  115.015033]  [<ffffffff810303ba>] native_safe_apic_wait_icr_idle+0x2a/0x60
[  115.015035]  [<ffffffff810317db>] default_send_IPI_mask_sequence_phys+0xeb/0x100
[  115.015037]  [<ffffffff81034cf7>] physflat_send_IPI_all+0x17/0x20
[  115.015039]  [<ffffffff81031980>] arch_trigger_all_cpu_backtrace+0x70/0xb0
[  115.015041]  [<ffffffff8109738e>] rcu_check_callbacks+0x3fe/0x660
[  115.015043]  [<ffffffff81058be7>] update_process_times+0x47/0x70
[  115.015045]  [<ffffffff810a12b9>] tick_sched_timer+0x49/0x140
[  115.015046]  [<ffffffff8106eef6>] __run_hrtimer+0x66/0x1a0
[  115.015048]  [<ffffffff810a1270>] ? tick_init_highres+0x20/0x20
[  115.015050]  [<ffffffff8106f777>] hrtimer_interrupt+0xf7/0x240
[  115.015052]  [<ffffffff81030187>] local_apic_timer_interrupt+0x37/0x60
[  115.015053]  [<ffffffff81503fbf>] smp_apic_timer_interrupt+0x3f/0x60
[  115.015055]  [<ffffffff81502c9d>] apic_timer_interrupt+0x6d/0x80
[  115.015056]  <EOI> 
[  115.015056]  [<ffffffff811c9b96>] ? kernfs_put+0xe6/0x190
[  115.015060]  [<ffffffff8116e03d>] ? d_shrink_del+0x3d/0x80
[  115.015061]  [<ffffffff8116f448>] shrink_dentry_list+0x68/0xd0
[  115.015063]  [<ffffffff81170364>] check_submounts_and_drop+0x74/0xa0
[  115.015065]  [<ffffffff811c97ec>] kernfs_dop_revalidate+0x5c/0xd0
[  115.015067]  [<ffffffff8116401d>] lookup_fast+0x26d/0x2c0
[  115.015068]  [<ffffffff81164fd9>] link_path_walk+0x1d9/0x890
[  115.015070]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.015072]  [<ffffffff811c9957>] ? kernfs_name_hash+0x17/0xd0
[  115.015074]  [<ffffffff814f7cc6>] ? __mutex_unlock_slowpath+0x16/0x40
[  115.015080]  [<ffffffff811656eb>] path_lookupat+0x5b/0x770
[  115.015086]  [<ffffffff8116e325>] ? __d_free+0x35/0x40
[  115.015092]  [<ffffffff8116f1d5>] ? dentry_kill+0x215/0x290
[  115.015098]  [<ffffffff81149a41>] ? kmem_cache_alloc+0x31/0x140
[  115.015104]  [<ffffffff811647bc>] ? getname_flags+0x2c/0x120
[  115.015110]  [<ffffffff81165e26>] filename_lookup.isra.50+0x26/0x60
[  115.015116]  [<ffffffff811695e4>] user_path_at_empty+0x54/0x90
[  115.015122]  [<ffffffff81164762>] ? final_putname+0x22/0x50
[  115.015128]  [<ffffffff811695ef>] ? user_path_at_empty+0x5f/0x90
[  115.015134]  [<ffffffff81169631>] user_path_at+0x11/0x20
[  115.015139]  [<ffffffff8115e590>] vfs_fstatat+0x50/0xa0
[  115.015145]  [<ffffffff8115e9e2>] SYSC_newlstat+0x22/0x40
[  115.015147]  [<ffffffff8115ed5c>] ? SyS_readlink+0x4c/0x110
[  115.015149]  [<ffffffff8115ebee>] SyS_newlstat+0xe/0x10
[  115.015151]  [<ffffffff81502109>] system_call_fastpath+0x16/0x1b
[  115.015151] Code: c7 85 20 05 00 00 00 00 00 00 41 5c 41 5d 5d c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 e5 5d c3 0f 1f 44 00 00 <55> 48 89 e5 0f 31 89 c0 48 c1 e2 20 5d 48 09 c2 48 89 d0 c3 66 
[  115.015168] NMI backtrace for cpu 11
[  115.015170] CPU: 11 PID: 0 Comm: swapper/11 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015171] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015172] task: ffff881808b54200 ti: ffff881808b6c000 task.ti: ffff881808b6c000
[  115.015173] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015175] RSP: 0018:ffff881808b6ded8  EFLAGS: 00000246
[  115.015176] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015177] RDX: 0000000000000000 RSI: ffff881808b6dfd8 RDI: 0000000000000046
[  115.015178] RBP: ffff881808b6ded8 R08: 0000000000000000 R09: 0000000000000002
[  115.015179] R10: 000000000000000d R11: 0000000000000001 R12: ffff881808b6dfd8
[  115.015179] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b6dfd8
[  115.015181] FS:  0000000000000000(0000) GS:ffff880c0faa0000(0000) knlGS:0000000000000000
[  115.015182] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015183] CR2: 00007f2bd3159e26 CR3: 00000018066f3000 CR4: 00000000000007e0
[  115.015183] Stack:
[  115.015184]  ffff881808b6dee8 ffffffff8100c806 ffff881808b6df30 ffffffff8108d4c9
[  115.015186]  ffff881808b6dfd8 ffff881808b6dfd8 0000000000000000 0000000000000000
[  115.015188]  0000000000000000 0000000000000000 0000000000000000 ffff881808b6df48
[  115.015190] Call Trace:
[  115.015192]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015194]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015196]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015197] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015301] NMI backtrace for cpu 12
[  115.015304] CPU: 12 PID: 0 Comm: swapper/12 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015306] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015308] task: ffff881808b54a40 ti: ffff881808b6e000 task.ti: ffff881808b6e000
[  115.015309] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015313] RSP: 0018:ffff881808b6fed8  EFLAGS: 00000246
[  115.015314] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015316] RDX: 0000000000000000 RSI: ffff881808b6ffd8 RDI: 0000000000000046
[  115.015317] RBP: ffff881808b6fed8 R08: 0000000000000000 R09: 0000000000000002
[  115.015318] R10: 0000000000000009 R11: 0000000000000001 R12: ffff881808b6ffd8
[  115.015320] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b6ffd8
[  115.015321] FS:  0000000000000000(0000) GS:ffff88180f2c0000(0000) knlGS:0000000000000000
[  115.015323] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015324] CR2: 000000305ce0e930 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  115.015326] Stack:
[  115.015327]  ffff881808b6fee8 ffffffff8100c806 ffff881808b6ff30 ffffffff8108d4c9
[  115.015330]  ffff881808b6ffd8 ffff881808b6ffd8 0000000000000000 0000000000000000
[  115.015334]  0000000000000000 0000000000000000 0000000000000000 ffff881808b6ff48
[  115.015338] Call Trace:
[  115.015341]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015344]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015347]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015348] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015371] NMI backtrace for cpu 13
[  115.015373] CPU: 13 PID: 0 Comm: swapper/13 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015374] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015376] task: ffff881808b55280 ti: ffff881808b70000 task.ti: ffff881808b70000
[  115.015377] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015380] RSP: 0018:ffff881808b71ed8  EFLAGS: 00000246
[  115.015381] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015382] RDX: 0000000000000000 RSI: ffff881808b71fd8 RDI: 0000000000000046
[  115.015383] RBP: ffff881808b71ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.015384] R10: 0000000000001b90 R11: 0000000000001b90 R12: ffff881808b71fd8
[  115.015386] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b71fd8
[  115.015392] FS:  0000000000000000(0000) GS:ffff880c0fac0000(0000) knlGS:0000000000000000
[  115.015398] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015404] CR2: 000000305be140b9 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  115.015410] Stack:
[  115.015415]  ffff881808b71ee8 ffffffff8100c806 ffff881808b71f30 ffffffff8108d4c9
[  115.015433]  ffff881808b71fd8 ffff881808b71fd8 0000000000000000 0000000000000000
[  115.015452]  0000000000000000 0000000000000000 0000000000000000 ffff881808b71f48
[  115.015472] Call Trace:
[  115.015482]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015489]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015492]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015493] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015513] NMI backtrace for cpu 14
[  115.015515] CPU: 14 PID: 0 Comm: swapper/14 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015516] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015518] task: ffff881808b55ac0 ti: ffff881808b72000 task.ti: ffff881808b72000
[  115.015519] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015522] RSP: 0018:ffff881808b73ed8  EFLAGS: 00000246
[  115.015523] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015524] RDX: 0000000000000000 RSI: ffff881808b73fd8 RDI: 0000000000000046
[  115.015526] RBP: ffff881808b73ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.015527] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b73fd8
[  115.015528] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b73fd8
[  115.015529] FS:  0000000000000000(0000) GS:ffff88180f2e0000(0000) knlGS:0000000000000000
[  115.015531] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015532] CR2: 00007fdf4e670000 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  115.015533] Stack:
[  115.015534]  ffff881808b73ee8 ffffffff8100c806 ffff881808b73f30 ffffffff8108d4c9
[  115.015537]  ffff881808b73fd8 ffff881808b73fd8 0000000000000000 0000000000000000
[  115.015549]  0000000000000000 0000000000000000 0000000000000000 ffff881808b73f48
[  115.015561] Call Trace:
[  115.015568]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015574]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015581]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015585] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015618] NMI backtrace for cpu 15
[  115.015620] CPU: 15 PID: 0 Comm: swapper/15 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015621] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015623] task: ffff881808b56300 ti: ffff881808b74000 task.ti: ffff881808b74000
[  115.015624] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015627] RSP: 0018:ffff881808b75ed8  EFLAGS: 00000246
[  115.015628] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015629] RDX: 0000000000000000 RSI: ffff881808b75fd8 RDI: 0000000000000046
[  115.015630] RBP: ffff881808b75ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.015631] R10: 0000000000001b90 R11: 0000000000001b90 R12: ffff881808b75fd8
[  115.015633] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b75fd8
[  115.015634] FS:  0000000000000000(0000) GS:ffff880c0fae0000(0000) knlGS:0000000000000000
[  115.015636] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015637] CR2: 00007fea91586000 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  115.015638] Stack:
[  115.015639]  ffff881808b75ee8 ffffffff8100c806 ffff881808b75f30 ffffffff8108d4c9
[  115.015642]  ffff881808b75fd8 ffff881808b75fd8 0000000000000000 0000000000000000
[  115.015645]  0000000000000000 0000000000000000 0000000000000000 ffff881808b75f48
[  115.015648] Call Trace:
[  115.015650]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015653]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015655]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015659] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015768] NMI backtrace for cpu 16
[  115.015771] CPU: 16 PID: 0 Comm: swapper/16 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015772] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015773] task: ffff881808b56b40 ti: ffff881808b76000 task.ti: ffff881808b76000
[  115.015774] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015777] RSP: 0018:ffff881808b77ed8  EFLAGS: 00000246
[  115.015778] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015780] RDX: 0000000000000000 RSI: ffff881808b77fd8 RDI: 0000000000000046
[  115.015781] RBP: ffff881808b77ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.015782] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b77fd8
[  115.015783] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b77fd8
[  115.015785] FS:  0000000000000000(0000) GS:ffff88180f300000(0000) knlGS:0000000000000000
[  115.015786] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015788] CR2: 000000305bebcac0 CR3: 0000000c075f2000 CR4: 00000000000007e0
[  115.015789] Stack:
[  115.015790]  ffff881808b77ee8 ffffffff8100c806 ffff881808b77f30 ffffffff8108d4c9
[  115.015793]  ffff881808b77fd8 ffff881808b77fd8 0000000000000000 0000000000000000
[  115.015796]  0000000000000000 0000000000000000 0000000000000000 ffff881808b77f48
[  115.015799] Call Trace:
[  115.015801]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015804]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015806]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015807] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.015882] NMI backtrace for cpu 17
[  115.015884] CPU: 17 PID: 0 Comm: swapper/17 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.015885] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.015887] task: ffff881808b57380 ti: ffff881808b78000 task.ti: ffff881808b78000
[  115.015888] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.015891] RSP: 0018:ffff881808b79ed8  EFLAGS: 00000246
[  115.015892] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.015893] RDX: 0000000000000000 RSI: ffff881808b79fd8 RDI: 0000000000000046
[  115.015894] RBP: ffff881808b79ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.015896] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b79fd8
[  115.015897] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b79fd8
[  115.015898] FS:  0000000000000000(0000) GS:ffff880c0fb00000(0000) knlGS:0000000000000000
[  115.015900] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.015901] CR2: 00007f20b355b220 CR3: 0000001795567000 CR4: 00000000000007e0
[  115.015902] Stack:
[  115.015903]  ffff881808b79ee8 ffffffff8100c806 ffff881808b79f30 ffffffff8108d4c9
[  115.015906]  ffff881808b79fd8 ffff881808b79fd8 0000000000000000 0000000000000000
[  115.015909]  0000000000000000 0000000000000000 0000000000000000 ffff881808b79f48
[  115.015912] Call Trace:
[  115.015915]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.015917]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.015919]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.015921] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016014] NMI backtrace for cpu 18
[  115.016019] CPU: 18 PID: 0 Comm: swapper/18 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016023] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016026] task: ffff881808b80000 ti: ffff881808b7a000 task.ti: ffff881808b7a000
[  115.016030] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016033] RSP: 0018:ffff881808b7bed8  EFLAGS: 00000246
[  115.016034] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016036] RDX: 0000000000000000 RSI: ffff881808b7bfd8 RDI: 0000000000000046
[  115.016037] RBP: ffff881808b7bed8 R08: 0000000000000000 R09: 0000000000000000
[  115.016038] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b7bfd8
[  115.016039] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7bfd8
[  115.016041] FS:  0000000000000000(0000) GS:ffff88180f320000(0000) knlGS:0000000000000000
[  115.016042] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016043] CR2: 00007f20b4898000 CR3: 0000001807166000 CR4: 00000000000007e0
[  115.016044] Stack:
[  115.016045]  ffff881808b7bee8 ffffffff8100c806 ffff881808b7bf30 ffffffff8108d4c9
[  115.016048]  ffff881808b7bfd8 ffff881808b7bfd8 0000000000000000 0000000000000000
[  115.016051]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7bf48
[  115.016054] Call Trace:
[  115.016057]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016059]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016062]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016063] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016083] NMI backtrace for cpu 19
[  115.016087] CPU: 19 PID: 0 Comm: swapper/19 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016092] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016097] task: ffff881808b80840 ti: ffff881808b7c000 task.ti: ffff881808b7c000
[  115.016103] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016112] RSP: 0018:ffff881808b7ded8  EFLAGS: 00000246
[  115.016117] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016123] RDX: 0000000000000000 RSI: ffff881808b7dfd8 RDI: 0000000000000046
[  115.016128] RBP: ffff881808b7ded8 R08: 0000000000000000 R09: 0000000000000002
[  115.016133] R10: 000000000000000d R11: 0000000000000001 R12: ffff881808b7dfd8
[  115.016139] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7dfd8
[  115.016144] FS:  0000000000000000(0000) GS:ffff880c0fb20000(0000) knlGS:0000000000000000
[  115.016149] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016155] CR2: 00007f6f4501b140 CR3: 0000000001a0c000 CR4: 00000000000007e0
[  115.016159] Stack:
[  115.016164]  ffff881808b7dee8 ffffffff8100c806 ffff881808b7df30 ffffffff8108d4c9
[  115.016183]  ffff881808b7dfd8 ffff881808b7dfd8 0000000000000000 0000000000000000
[  115.016196]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7df48
[  115.016198] Call Trace:
[  115.016200]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016202]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016204]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016204] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016219] NMI backtrace for cpu 20
[  115.016223] CPU: 20 PID: 0 Comm: swapper/20 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016224] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016226] task: ffff881808b81080 ti: ffff881808b7e000 task.ti: ffff881808b7e000
[  115.016227] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016231] RSP: 0018:ffff881808b7fed8  EFLAGS: 00000246
[  115.016232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016234] RDX: 0000000000000000 RSI: ffff881808b7ffd8 RDI: 0000000000000046
[  115.016235] RBP: ffff881808b7fed8 R08: 0000000000000000 R09: 0000000000000002
[  115.016236] R10: 0000000000000009 R11: 0000000000000001 R12: ffff881808b7ffd8
[  115.016238] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b7ffd8
[  115.016240] FS:  0000000000000000(0000) GS:ffff88180f340000(0000) knlGS:0000000000000000
[  115.016241] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016243] CR2: 00007fc77122f000 CR3: 0000000b8d89a000 CR4: 00000000000007e0
[  115.016244] Stack:
[  115.016245]  ffff881808b7fee8 ffffffff8100c806 ffff881808b7ff30 ffffffff8108d4c9
[  115.016248]  ffff881808b7ffd8 ffff881808b7ffd8 0000000000000000 0000000000000000
[  115.016252]  0000000000000000 0000000000000000 0000000000000000 ffff881808b7ff48
[  115.016265] Call Trace:
[  115.016273]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016282]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016289]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016293] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016337] NMI backtrace for cpu 21
[  115.016339] CPU: 21 PID: 0 Comm: swapper/21 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016340] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016341] task: ffff881808b818c0 ti: ffff881808b90000 task.ti: ffff881808b90000
[  115.016342] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016344] RSP: 0018:ffff881808b91ed8  EFLAGS: 00000246
[  115.016345] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016346] RDX: 0000000000000000 RSI: ffff881808b91fd8 RDI: 0000000000000046
[  115.016347] RBP: ffff881808b91ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.016347] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b91fd8
[  115.016348] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b91fd8
[  115.016349] FS:  0000000000000000(0000) GS:ffff880c0fb40000(0000) knlGS:0000000000000000
[  115.016350] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016351] CR2: 0000000000485080 CR3: 0000001782aec000 CR4: 00000000000007e0
[  115.016352] Stack:
[  115.016353]  ffff881808b91ee8 ffffffff8100c806 ffff881808b91f30 ffffffff8108d4c9
[  115.016355]  ffff881808b91fd8 ffff881808b91fd8 0000000000000000 0000000000000000
[  115.016357]  0000000000000000 0000000000000000 0000000000000000 ffff881808b91f48
[  115.016359] Call Trace:
[  115.016361]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016362]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016364]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016365] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016462] NMI backtrace for cpu 22
[  115.016464] CPU: 22 PID: 0 Comm: swapper/22 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016466] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016467] task: ffff881808b82100 ti: ffff881808b94000 task.ti: ffff881808b94000
[  115.016468] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016472] RSP: 0018:ffff881808b95ed8  EFLAGS: 00000246
[  115.016473] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016474] RDX: 0000000000000000 RSI: ffff881808b95fd8 RDI: 0000000000000046
[  115.016475] RBP: ffff881808b95ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.016476] R10: 0000000000000000 R11: 0000000000000001 R12: ffff881808b95fd8
[  115.016478] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b95fd8
[  115.016479] FS:  0000000000000000(0000) GS:ffff88180f360000(0000) knlGS:0000000000000000
[  115.016481] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016482] CR2: 00000000004ea300 CR3: 0000000b8dbb5000 CR4: 00000000000007e0
[  115.016483] Stack:
[  115.016484]  ffff881808b95ee8 ffffffff8100c806 ffff881808b95f30 ffffffff8108d4c9
[  115.016487]  ffff881808b95fd8 ffff881808b95fd8 0000000000000000 0000000000000000
[  115.016491]  0000000000000000 0000000000000000 0000000000000000 ffff881808b95f48
[  115.016494] Call Trace:
[  115.016496]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016499]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016502]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016503] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 
[  115.016555] NMI backtrace for cpu 23
[  115.016557] CPU: 23 PID: 0 Comm: swapper/23 Tainted: G           O 3.14.50-00038-gc214cb8 #22
[  115.016557] Hardware name: Dell Inc. PowerEdge R610/0F0XJ6, BIOS 6.3.0 07/24/2012
[  115.016558] task: ffff881808b82940 ti: ffff881808b96000 task.ti: ffff881808b96000
[  115.016559] RIP: 0010:[<ffffffff8100bee8>]  [<ffffffff8100bee8>] mwait_idle+0x68/0xa0
[  115.016561] RSP: 0018:ffff881808b97ed8  EFLAGS: 00000246
[  115.016562] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  115.016563] RDX: 0000000000000000 RSI: ffff881808b97fd8 RDI: 0000000000000046
[  115.016564] RBP: ffff881808b97ed8 R08: 0000000000000000 R09: 0000000000000000
[  115.016565] R10: 0000000000001b92 R11: 0000000000001b90 R12: ffff881808b97fd8
[  115.016566] R13: ffffffff81acc9e0 R14: 0000000000000000 R15: ffff881808b97fd8
[  115.016567] FS:  0000000000000000(0000) GS:ffff880c0fb60000(0000) knlGS:0000000000000000
[  115.016568] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[  115.016569] CR2: 0000000000430090 CR3: 0000000c08323000 CR4: 00000000000007e0
[  115.016569] Stack:
[  115.016570]  ffff881808b97ee8 ffffffff8100c806 ffff881808b97f30 ffffffff8108d4c9
[  115.016572]  ffff881808b97fd8 ffff881808b97fd8 0000000000000000 0000000000000000
[  115.016588]  0000000000000000 0000000000000000 0000000000000000 ffff881808b97f48
[  115.016592] Call Trace:
[  115.016594]  [<ffffffff8100c806>] arch_cpu_idle+0x26/0x30
[  115.016596]  [<ffffffff8108d4c9>] cpu_startup_entry+0x79/0x220
[  115.016598]  [<ffffffff8102e476>] start_secondary+0x1d6/0x280
[  115.016598] Code: ae f0 31 d2 65 48 8b 34 25 f0 a7 00 00 48 8d 86 38 e0 ff ff 48 89 d1 0f 01 c8 48 8b 86 38 e0 ff ff a8 08 75 32 31 c0 fb 0f 01 c9 <65> 48 8b 04 25 f0 a7 00 00 83 a0 3c e0 ff ff fb 0f ae f0 48 8b 


Here is my revert patch that appears to solve my lockups on top of
3.14.58.

[PATCH] Revert "don't remove from shrink list in select_collect()"

This reverts commit c214cb82cdc744225d85899fc138251527f75fff.

This also adds back dentry_lru_del() which was later removed as part of
85903ac93619905fe0f07e85dac57324a0936759 "more graceful recovery in
umount_collect()" to allow it to compile.

Signed-off-by: Shawn Bohrer <sbohrer@...advisors.com>
---
 fs/dcache.c | 47 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index 65ccdf0..239987b 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -393,6 +393,22 @@ static void dentry_lru_add(struct dentry *dentry)
 		d_lru_add(dentry);
 }
 
+/*
+ * Remove a dentry with references from the LRU.
+ *
+ * If we are on the shrink list, then we can get to try_prune_one_dentry() and
+ * lose our last reference through the parent walk. In this case, we need to
+ * remove ourselves from the shrink list, not the LRU.
+ */
+static void dentry_lru_del(struct dentry *dentry)
+{
+	if (dentry->d_flags & DCACHE_LRU_LIST) {
+		if (dentry->d_flags & DCACHE_SHRINK_LIST)
+			return d_shrink_del(dentry);
+		d_lru_del(dentry);
+	}
+}
+
 /**
  * d_drop - drop a dentry
  * @dentry: dentry to drop
@@ -1196,23 +1212,34 @@ static enum d_walk_ret select_collect(void *_data, struct dentry *dentry)
 	if (data->start == dentry)
 		goto out;
 
-	if (dentry->d_flags & DCACHE_SHRINK_LIST) {
+	/*
+	 * move only zero ref count dentries to the dispose list.
+	 *
+	 * Those which are presently on the shrink list, being processed
+	 * by shrink_dentry_list(), shouldn't be moved.  Otherwise the
+	 * loop in shrink_dcache_parent() might not make any progress
+	 * and loop forever.
+	 */
+	if (dentry->d_lockref.count) {
+		dentry_lru_del(dentry);
+	} else if (!(dentry->d_flags & DCACHE_SHRINK_LIST)) {
+		/*
+		 * We can't use d_lru_shrink_move() because we
+		 * need to get the global LRU lock and do the
+		 * LRU accounting.
+		 */
+		d_lru_del(dentry);
+		d_shrink_add(dentry, &data->dispose);
 		data->found++;
-	} else {
-		if (dentry->d_flags & DCACHE_LRU_LIST)
-			d_lru_del(dentry);
-		if (!dentry->d_lockref.count) {
-			d_shrink_add(dentry, &data->dispose);
-			data->found++;
-		}
+		ret = D_WALK_NORETRY;
 	}
 	/*
 	 * We can return to the caller if we have found some (this
 	 * ensures forward progress). We'll be coming back to find
 	 * the rest.
 	 */
-	if (!list_empty(&data->dispose))
-		ret = need_resched() ? D_WALK_QUIT : D_WALK_NORETRY;
+	if (data->found && need_resched())
+		ret = D_WALK_QUIT;
 out:
 	return ret;
 }
-- 
2.2.1

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