Date:	Mon, 04 Jan 2016 09:47:50 +0800
From:	kernel test robot <ying.huang@...ux.intel.com>
TO:	Josef Bacik <jbacik@...com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: [lkp] [Btrfs] 13a662d164: WARNING: CPU: 3 PID: 2933 at
 fs/btrfs/extent-tree.c:9752 btrfs_free_block_groups+0x26f/0x3f0 [btrfs]()

FYI, we noticed the below changes on

git://internal_merge_and_test_tree revert-13a662d1648a4241f1969a595b028e32dc47b51c-82f039047282e90f2692a21271666632abe1e075
commit 13a662d1648a4241f1969a595b028e32dc47b51c ("Btrfs: warn_on for unaccounted spaces")


+---------------------------------------------------------------------+------------+------------+
|                                                                     | 8443216ce3 | 13a662d164 |
+---------------------------------------------------------------------+------------+------------+
| boot_successes                                                      | 5          | 18         |
| boot_failures                                                       | 2          | 3          |
| invoked_oom-killer:gfp_mask=0x                                      | 1          |            |
| Mem-Info                                                            | 1          |            |
| Out_of_memory:Kill_process                                          | 1          |            |
| backtrace:vfs_read                                                  | 1          |            |
| backtrace:SyS_read                                                  | 1          |            |
| backtrace:vfs_write                                                 | 1          |            |
| backtrace:SyS_write                                                 | 1          |            |
| backtrace:_do_fork                                                  | 1          |            |
| backtrace:SyS_clone                                                 | 1          |            |
| backtrace:vfs_fallocate                                             | 1          |            |
| backtrace:SyS_fallocate                                             | 1          |            |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks                        | 1          |            |
| BUG:kernel_test_crashed                                             | 0          | 1          |
| WARNING:at_fs/btrfs/extent-tree.c:#btrfs_free_block_groups[btrfs]() | 0          | 2          |
+---------------------------------------------------------------------+------------+------------+



<6>[  140.931789] BTRFS: creating UUID tree
<6>[  141.131875] BTRFS info (device sda6): qgroup scan completed (inconsistency flag cleared)
<4>[  141.806064] ------------[ cut here ]------------
<4>[  141.812022] WARNING: CPU: 3 PID: 2933 at fs/btrfs/extent-tree.c:9752 btrfs_free_block_groups+0x26f/0x3f0 [btrfs]()
<4>[  141.826535] Modules linked in: loop dm_mod rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver netconsole btrfs xor raid6_pq sg sd_mod snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic ata_generic pata_acpi x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul eeepc_wmi crc32_pclmul asus_wmi crc32c_intel sparse_keymap ghash_clmulni_intel rfkill ppdev aesni_intel snd_hda_intel snd_hda_codec snd_hda_core i915 drm_kms_helper lrw gf128mul glue_helper syscopyarea ablk_helper pata_via sysfillrect sysimgblt cryptd snd_hwdep pcspkr snd_pcm microcode serio_raw fb_sys_fops ata_piix snd_timer snd libata soundcore drm shpchp wmi parport_pc parport tpm_infineon video
<4>[  141.894332] CPU: 3 PID: 2933 Comm: umount Not tainted 4.3.0-rc5-00148-g13a662d #1
<4>[  141.902919] Hardware name: System manufacturer System Product Name/P8H67-M PRO, BIOS 1002 04/01/2011
<47>
[  141.903340] systemd-journald[125]: Compressed data object 673 -> 504
<4>[  141.920519]  ffffffffa080e930 ffff88007d53fcf8 ffffffff814028b2 0000000000000000
<4>[  141.928987]  ffff88007d53fd30 ffffffff81074726 ffff8801a6902000 ffff8801a6902088
<4>[  141.937413]  ffff8801a6a04080 ffff8801a6a04000 ffff8801a6a04090 ffff88007d53fd40
<4>[  141.945820] Call Trace:
<4>[  141.949195]  [<ffffffff814028b2>] dump_stack+0x4b/0x69
<4>[  141.955254]  [<ffffffff81074726>] warn_slowpath_common+0x86/0xc0
<4>[  141.962155]  [<ffffffff8107481a>] warn_slowpath_null+0x1a/0x20
<4>[  141.968872]  [<ffffffffa077888f>] btrfs_free_block_groups+0x26f/0x3f0 [btrfs]
<4>[  141.976875]  [<ffffffffa0789b10>] close_ctree+0x190/0x370 [btrfs]
<4>[  141.983823]  [<ffffffff811fcaba>] ? evict_inodes+0x16a/0x180
<4>[  141.990317]  [<ffffffffa075ae79>] btrfs_put_super+0x19/0x20 [btrfs]
<4>[  141.997408]  [<ffffffff811e2e1a>] generic_shutdown_super+0x6a/0x100
<4>[  142.004491]  [<ffffffff811e2ec2>] kill_anon_super+0x12/0x20
<4>[  142.010866]  [<ffffffffa075f048>] btrfs_kill_super+0x18/0x120 [btrfs]
<4>[  142.018094]  [<ffffffff811e2853>] deactivate_locked_super+0x43/0x70
<4>[  142.025135]  [<ffffffff811e28dc>] deactivate_super+0x5c/0x60
<4>[  142.031533]  [<ffffffff811ffaaf>] cleanup_mnt+0x3f/0x90
<4>[  142.037484]  [<ffffffff811ffb42>] __cleanup_mnt+0x12/0x20
<4>[  142.043596]  [<ffffffff81091466>] task_work_run+0x76/0xb0
<4>[  142.049712]  [<ffffffff81003b07>] prepare_exit_to_usermode+0xc7/0x110
<4>[  142.056844]  [<ffffffff81003ba5>] syscall_return_slowpath+0x55/0x160
<4>[  142.063895]  [<ffffffff818ae28c>] int_ret_from_sys_call+0x25/0x8f
<4>[  142.070673] ---[ end trace 171ab39315b5f6b5 ]---
<6>[  142.075982] BTRFS: space_info 1 has 3080192 free, is not full


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,
Ying Huang

View attachment "config-4.3.0-rc5-00148-g13a662d" of type "text/plain" (141579 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (67652 bytes)

View attachment "job.yaml" of type "text/plain" (3214 bytes)

Download attachment "reproduce.sh" of type "application/x-sh" (1808 bytes)

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