linux-kernel - [Btrfs] 3119070142: WARNING: CPU: 2 PID: 4416 at fs/btrfs/extent-tree.c:9660 btrfs_free_block

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Date:	Wed, 25 May 2016 04:08:19 +0800
From:	kernel test robot <xiaolong.ye@...el.com>
To:	Josef Bacik <jbacik@...com>
Cc:	lkp@...org, Stephen Rothwell <sfr@...b.auug.org.au>,
	LKML <linux-kernel@...r.kernel.org>,
	David Sterba <dsterba@...e.com>
Subject: [Btrfs] 3119070142: WARNING: CPU: 2 PID: 4416 at
 fs/btrfs/extent-tree.c:9660 btrfs_free_block_groups+0x287/0x400 [btrfs]



FYI, we noticed the following commit:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 311907014249d72f7f183846524b84a8e9cf0852 ("Btrfs: warn_on for unaccounted spaces")

in testcase: xfstests
with following parameters: disk=6HDD/fs=btrfs/test=btrfs-mid1

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

caused below changes:


+----------------+------------+------------+
|                | ea66a8b977 | 3119070142 |
+----------------+------------+------------+
| boot_successes | 0          | 0          |
+----------------+------------+------------+



<6>[  147.393369] BTRFS: creating UUID tree
<6>[  147.592165] BTRFS info (device sdh1): qgroup scan completed (inconsistency flag cleared)
<4>[  148.350235] ------------[ cut here ]------------
<4>[  148.355099] WARNING: CPU: 2 PID: 4416 at fs/btrfs/extent-tree.c:9660 btrfs_free_block_groups+0x287/0x400 [btrfs]
<4>[  148.367424] Modules linked in: loop dm_mod btrfs xor raid6_pq ses enclosure ipmi_devintf rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver sg sr_mod ata_generic cdrom sd_mod pata_acpi coretemp kvm_intel snd_pcm ahci snd_timer kvm irqbypass crct10dif_pclmul crc32_pclmul crc32c_intel mptsas pata_jmicron libahci mptscsih mptbase snd ppdev scsi_transport_sas i7core_edac ghash_clmulni_intel soundcore aesni_intel pcspkr lrw gf128mul glue_helper serio_raw ablk_helper libata cryptd ipmi_si parport_pc shpchp edac_core parport ipmi_msghandler acpi_cpufreq
<4>[  148.421369] CPU: 2 PID: 4416 Comm: umount Not tainted 4.6.0-rc5-00005-g3119070 #1
<4>[  148.422321] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/06/2010
<4>[  148.422321]  0000000000000000 ffff88043b047cf0 ffffffff8142e59a 0000000000000000
<4>[  148.422321]  0000000000000000 ffff88043b047d30 ffffffff8107b9b1 000025bc810e4731
<4>[  148.422321]  ffff8800b407f800 ffff8800b407f888 ffff88042bfa4000 ffff8800b407fa00
<4>[  148.422321] Call Trace:
<4>[  148.422321]  [<ffffffff8142e59a>] dump_stack+0x63/0x89
<4>[  148.422321]  [<ffffffff8107b9b1>] __warn+0xd1/0xf0
<4>[  148.422321]  [<ffffffff8107ba9d>] warn_slowpath_null+0x1d/0x20
<4>[  148.422321]  [<ffffffffa049cac7>] btrfs_free_block_groups+0x287/0x400 [btrfs]
<4>[  148.422321]  [<ffffffffa04ae110>] close_ctree+0x190/0x370 [btrfs]
<4>[  148.422321]  [<ffffffff812179aa>] ? evict_inodes+0x16a/0x180
<4>[  148.422321]  [<ffffffffa047e009>] btrfs_put_super+0x19/0x20 [btrfs]
<4>[  148.422321]  [<ffffffff811fda0f>] generic_shutdown_super+0x6f/0x100
<4>[  148.422321]  [<ffffffff811fdab2>] kill_anon_super+0x12/0x20
<4>[  148.422321]  [<ffffffffa0482788>] btrfs_kill_super+0x18/0x110 [btrfs]
<4>[  148.422321]  [<ffffffff811fd443>] deactivate_locked_super+0x43/0x70
<4>[  148.422321]  [<ffffffff811fd4cc>] deactivate_super+0x5c/0x60
<4>[  148.422321]  [<ffffffff8121aa5f>] cleanup_mnt+0x3f/0x90
<4>[  148.422321]  [<ffffffff8121aaf2>] __cleanup_mnt+0x12/0x20
<4>[  148.422321]  [<ffffffff81099506>] task_work_run+0x76/0xb0
<4>[  148.422321]  [<ffffffff81003242>] exit_to_usermode_loop+0xc2/0xd0
<4>[  148.422321]  [<ffffffff81003bd5>] syscall_return_slowpath+0xf5/0x180
<4>[  148.422321]  [<ffffffff81905a3a>] entry_SYSCALL_64_fastpath+0xa2/0xa4
<4>[  148.571830] ---[ end trace 30cd91c0f3d49e77 ]---
<47>



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,
Kernel Test Robot

View attachment "config-4.6.0-rc5-00005-g3119070" of type "text/plain" (147025 bytes)

Download attachment "kmsg.xz" of type "application/octet-stream" (43508 bytes)

View attachment "job.yaml" of type "text/plain" (3192 bytes)

View attachment "reproduce" of type "text/plain" (1465 bytes)