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Date:	Wed, 29 Apr 2015 19:45:40 +0800
From:	Li Xi <pkuelelixi@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	Dave Chinner <david@...morbit.com>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Ext4 Developers List <linux-ext4@...r.kernel.org>,
	"Theodore Ts'o" <tytso@....edu>,
	Andreas Dilger <adilger@...ger.ca>,
	"viro@...iv.linux.org.uk" <viro@...iv.linux.org.uk>,
	"hch@...radead.org" <hch@...radead.org>,
	Dmitry Monakhov <dmonakhov@...nvz.org>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [v14 3/4] ext4: adds FS_IOC_FSSETXATTR/FS_IOC_FSGETXATTR
 interface support

On Wed, Apr 29, 2015 at 3:59 PM, Jan Kara <jack@...e.cz> wrote:
>   Hi,
>
> On Wed 29-04-15 13:49:08, Li Xi wrote:
>> Thanks for the advices. I tried to run latest xfstests again. However,
>   Dave actually asked you to update 'xfsprogs' not xfstests. Not that
> updating xfstests would be a wrong thing to do but you still need to update
> xfsprogs for xfstests to be able to run some tests. But that's unrelated to
> the oops you reported below.
Understood. I updated both xfstests and xfsprogs to the latest version from git
repository. However, I didn't update xfsdump because of a build failure caused
by missing definitons of 'min' and 'max'
>
>> the kernel crashed when runing generic/051 generic/054 and
>> generic/055. And please note that the kernel also crashed on original
>> linux-4.0 without any of my patches. Following is one of the dump
>> stack:
>   It looks like some issue with timers. John, Thomas, any idea?
>
>                                                                 Honza
>
>> run fstests generic/055 at 2015-04-29 13:43:39
>> ------------[ cut here ]------------
>> WARNING: CPU: 0 PID: 31915 at lib/list_debug.c:33 __list_add+0xbe/0xd0()
>> list_add corruption. prev->next should be next (ffffffff81e05018), but
>> was           (null). (prev=ffff8800d8ff3ca0).
>> Modules linked in: dm_flakey xfs exportfs libcrc32c nfsv3 nfs_acl
>> rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs fscache lockd grace
>> sunrpc ipv6 dm_mirror dm_region_hash dm_log dm_mod ppdev floppy
>> parport_pc parport microcode pcspkr virtio_balloon sg 8139too 8139cp
>> mii i2c_piix4 i2c_core ext4 jbd2 mbcache sr_mod cdrom sd_mod pata_acpi
>> ata_generic ata_piix virtio_pci virtio_ring virtio [last unloaded:
>> speedstep_lib]
>> CPU: 0 PID: 31915 Comm: kworker/0:0 Not tainted 4.0.0+ #1
>> Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
>> Workqueue: events vmstat_shepherd
>>  0000000000000021 ffff8800db177bf8 ffffffff815ccaf6 0000000000000021
>>  ffff8800db177c48 ffff8800db177c38 ffffffff81059fc5 ffff8800db177c38
>>  ffffffff81a8d480 ffffffff81e05018 ffff8800d8ff3ca0 0000000000000000
>> Call Trace:
>>  [<ffffffff815ccaf6>] dump_stack+0x48/0x5a
>>  [<ffffffff81059fc5>] warn_slowpath_common+0x95/0xe0
>>  [<ffffffff8105a0c6>] warn_slowpath_fmt+0x46/0x70
>>  [<ffffffff812c04fe>] __list_add+0xbe/0xd0
>>  [<ffffffff810bb84b>] __internal_add_timer+0x9b/0x110
>>  [<ffffffff810bb8f9>] internal_add_timer+0x39/0x90
>>  [<ffffffff810bd8c9>] mod_timer+0xf9/0x1d0
>>  [<ffffffff810bd9b8>] add_timer+0x18/0x30
>>  [<ffffffff81071a22>] __queue_delayed_work+0x92/0x1a0
>>  [<ffffffff81071bcd>] queue_delayed_work_on+0x1d/0x40
>>  [<ffffffff81160d5c>] vmstat_shepherd+0x10c/0x120
>>  [<ffffffff810722ed>] process_one_work+0x14d/0x440
>>  [<ffffffff810726ff>] worker_thread+0x11f/0x3d0
>>  [<ffffffff815ccfaf>] ? __schedule+0x36f/0x800
>>  [<ffffffff810725e0>] ? process_one_work+0x440/0x440
>>  [<ffffffff810725e0>] ? process_one_work+0x440/0x440
>>  [<ffffffff810774ce>] kthread+0xce/0xf0
>>  [<ffffffff8104d96e>] ? __do_page_fault+0x17e/0x430
>>  [<ffffffff81077400>] ? kthread_freezable_should_stop+0x70/0x70
>>  [<ffffffff815d1052>] ret_from_fork+0x42/0x70
>>  [<ffffffff81077400>] ? kthread_freezable_should_stop+0x70/0x70
>> ---[ end trace 97c6b752be15ac57 ]---
>> XFS (sdb2): Mounting V4 Filesystem
>> XFS (sdb2): Ending clean mount
>> XFS (sdb2): Quotacheck needed: Please wait.
>> XFS (sdb2): Quotacheck: Done.
>> XFS (sdb2): xfs_log_force: error -5 returned.
>> XFS (sdb2): xfs_log_force: error -5 returned.
>> XFS (sdb2): xfs_log_force: error -5 returned.
>> BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
>> IP: [<ffffffff810bbc88>] get_next_timer_interrupt+0x158/0x230
>> PGD d8e7a067 PUD db654067 PMD 0
>> Oops: 0000 [#1] SMP
>> Modules linked in: dm_flakey xfs exportfs libcrc32c nfsv3 nfs_acl
>> rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs fscache lockd grace
>> sunrpc ipv6 dm_mirror dm_region_hash dm_log dm_mod ppdev floppy
>> parport_pc parport microcode pcspkr virtio_balloon sg 8139too 8139cp
>> mii i2c_piix4 i2c_core ext4 jbd2 mbcache sr_mod cdrom sd_mod pata_acpi
>> ata_generic ata_piix virtio_pci virtio_ring virtio [last unloaded:
>> speedstep_lib]
>> CPU: 0 PID: 0 Comm: swapper/0 Tainted: G        W       4.0.0+ #1
>> Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
>> task: ffffffff81a134a0 ti: ffffffff81a00000 task.ti: ffffffff81a00000
>> RIP: 0010:[<ffffffff810bbc88>]  [<ffffffff810bbc88>]
>> get_next_timer_interrupt+0x158/0x230
>> RSP: 0018:ffff88011fc03e48  EFLAGS: 00010013
>> RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81e05008
>> RDX: 0000000000000001 RSI: 0000000000000011 RDI: ffffffff81e04ef8
>> RBP: ffff88011fc03ea8 R08: 0000000000000011 R09: 0000000001000551
>> R10: ffff88011fc03e60 R11: ffff88011fc03e78 R12: 0000000140055030
>> R13: 0000000100055031 R14: ffffffff81e03ec0 R15: 0000000000000040
>> FS:  0000000000000000(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
>> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
>> CR2: 0000000000000018 CR3: 00000000d8d8f000 CR4: 00000000000006f0
>> Stack:
>>  ffff88011fc03e88 ffffffff810bbdf7 ffffffff81e04ef8 ffffffff81e052f8
>>  ffffffff81e056f8 ffffffff81e05af8 0000000000000000 ffff88011fc0f8a0
>>  0000000100055031 0000000000000000 ffff88011fc0bfc0 ffffffff81a00000
>> Call Trace:
>>  <IRQ>
>>  [<ffffffff810bbdf7>] ? call_timer_fn+0x47/0x110
>>  [<ffffffff810cdf1d>] tick_nohz_stop_sched_tick+0x1cd/0x310
>>  [<ffffffff810ce108>] __tick_nohz_idle_enter+0xa8/0x150
>>  [<ffffffff810ce1dd>] tick_nohz_irq_exit+0x2d/0x40
>>  [<ffffffff8105deaf>] irq_exit+0x9f/0xc0
>>  [<ffffffff815d34aa>] smp_apic_timer_interrupt+0x4a/0x59
>>  [<ffffffff815d1a3b>] apic_timer_interrupt+0x6b/0x70
>>  <EOI>
>>  [<ffffffff8100f100>] ? default_idle+0x20/0xb0
>>  [<ffffffff8100e74f>] arch_cpu_idle+0xf/0x20
>>  [<ffffffff810986a9>] cpuidle_idle_call+0x89/0x220
>>  [<ffffffff81078232>] ? __atomic_notifier_call_chain+0x12/0x20
>>  [<ffffffff81098975>] cpu_idle_loop+0x135/0x1f0
>>  [<ffffffff81098a43>] cpu_startup_entry+0x13/0x20
>>  [<ffffffff815c5e1c>] rest_init+0x7c/0x80
>>  [<ffffffff81b4e372>] start_kernel+0x3d8/0x3df
>>  [<ffffffff81b4ddb8>] ? set_init_arg+0x5d/0x5d
>>  [<ffffffff815cb906>] ? memblock_reserve+0x4c/0x51
>>  [<ffffffff81b4d5ad>] x86_64_start_reservations+0x2a/0x2c
>>  [<ffffffff81b4d6e4>] x86_64_start_kernel+0x135/0x13c
>> Code: 00 48 89 45 c8 45 89 c8 41 83 e0 3f 44 89 c6 0f 1f 40 00 48 63
>> ce 48 c1 e1 04 48 8b 04 39 48 8d 0c 0f 48 39 c8 74 22 0f 1f 40 00 <f6>
>> 40 18 01 75 10 48 8b 50 10 48 39 da 48 0f 48 da ba 01 00 00
>> RIP  [<ffffffff810bbc88>] get_next_timer_interrupt+0x158/0x230
>>  RSP <ffff88011fc03e48>
>> CR2: 0000000000000018
> --
> Jan Kara <jack@...e.cz>
> SUSE Labs, CR
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