linux-kernel - [lkp] [Btrfs] 2e78c927d7: WARNING: CPU: 0 PID: 2145 at fs/btrfs/inode.c:9113 btrfs_destroy

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Date:	Wed, 18 May 2016 10:18:13 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Chandan Rajendra <chandan@...ux.vnet.ibm.com>
Cc:	David Sterba <dsterba@...e.com>,
	LKML <linux-kernel@...r.kernel.org>, lkp@...org
Subject: [lkp] [Btrfs] 2e78c927d7: WARNING: CPU: 0 PID: 2145 at
 fs/btrfs/inode.c:9113 btrfs_destroy_inode+0x254/0x2c0 [btrfs]()

FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 2e78c927d79333f299a8ac81c2fd2952caeef335 ("Btrfs: __btrfs_buffered_write: Reserve/release extents aligned to block size")

on test machine: lkp-ws02:  threads Westmere-EP with 16G memory

caused below changes:


<12>
[   42.862819] run fstests generic/127 at 2016-03-17 20:23:35
<4>[ 1224.626228] ------------[ cut here ]------------
<4>[ 1224.631015] WARNING: CPU: 0 PID: 2145 at fs/btrfs/inode.c:9113 btrfs_destroy_inode+0x254/0x2c0 [btrfs]()
<4>[ 1224.642679] Modules linked in: dm_mod btrfs xor raid6_pq ses enclosure ipmi_devintf rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sg sr_mod cdrom ata_generic sd_mod pata_acpi coretemp kvm_intel mptsas mptscsih mptbase kvm irqbypass crct10dif_pclmul snd_pcm ahci snd_timer crc32_pclmul libahci pata_jmicron crc32c_intel scsi_transport_sas snd soundcore aesni_intel lrw gf128mul glue_helper ppdev pcspkr serio_raw libata ipmi_si ablk_helper i7core_edac shpchp cryptd parport_pc edac_core parport ipmi_msghandler acpi_cpufreq
<4>[ 1224.691853] CPU: 0 PID: 2145 Comm: umount Not tainted 4.4.0-rc6-00122-g2e78c92 #1
<4>[ 1224.699638] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/06/2010
<47>
[ 1224.700052] systemd-journald[291]: Compressed data object 519 -> 436
<4>[ 1224.713053]  ffffffffa051bd30 ffff88022889bcb0 ffffffff8140cce2 0000000000000000
<4>[ 1224.720978]  ffff88022889bce8 ffffffff81078736 ffff88022b6801c8 ffff88022b6801c8
<4>[ 1224.728840]  ffff88043ac42000 ffff88042bea3ce8 ffff88042bea3ce8 ffff88022889bcf8
<4>[ 1224.736719] Call Trace:
<4>[ 1224.739359]  [<ffffffff8140cce2>] dump_stack+0x4b/0x69
<4>[ 1224.744684]  [<ffffffff81078736>] warn_slowpath_common+0x86/0xc0
<4>[ 1224.750879]  [<ffffffff8107882a>] warn_slowpath_null+0x1a/0x20
<4>[ 1224.756913]  [<ffffffffa04a6e34>] btrfs_destroy_inode+0x254/0x2c0 [btrfs]
<4>[ 1224.763891]  [<ffffffff81200d28>] destroy_inode+0x38/0x60
<4>[ 1224.769476]  [<ffffffff81201262>] evict+0x132/0x190
<4>[ 1224.774539]  [<ffffffff812012f7>] dispose_list+0x37/0x60
<4>[ 1224.780046]  [<ffffffff812028aa>] evict_inodes+0x16a/0x180
<4>[ 1224.785733]  [<ffffffff811e8d9f>] generic_shutdown_super+0x3f/0x100
<4>[ 1224.792183]  [<ffffffff811e8e72>] kill_anon_super+0x12/0x20
<4>[ 1224.797942]  [<ffffffffa04664f8>] btrfs_kill_super+0x18/0x110 [btrfs]
<4>[ 1224.804577]  [<ffffffff811e8803>] deactivate_locked_super+0x43/0x70
<4>[ 1224.811034]  [<ffffffff811e888c>] deactivate_super+0x5c/0x60
<4>[ 1224.816884]  [<ffffffff8120594f>] cleanup_mnt+0x3f/0x90
<4>[ 1224.822297]  [<ffffffff812059e2>] __cleanup_mnt+0x12/0x20
<4>[ 1224.827884]  [<ffffffff81094d16>] task_work_run+0x76/0xb0
<4>[ 1224.833474]  [<ffffffff81003352>] exit_to_usermode_loop+0xc2/0xd0
<4>[ 1224.839753]  [<ffffffff81003bd5>] syscall_return_slowpath+0xf5/0x160
<4>[ 1224.846307]  [<ffffffff818c2288>] int_ret_from_sys_call+0x25/0x8f
<4>[ 1224.852582] ---[ end trace cb6a25f841edb72b ]---
<4>[ 1224.857482] ------------[ cut here ]------------



To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong

View attachment "config-4.4.0-rc6-00122-g2e78c92" of type "text/plain" (143076 bytes)

Download attachment "kmsg.xz" of type "application/octet-stream" (30384 bytes)

View attachment "job.yaml" of type "text/plain" (3165 bytes)

View attachment "reproduce" of type "text/plain" (731 bytes)