From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Wu Subject: 2.6.39-rc1: btrfs "WARNING: at fs/btrfs/inode.c:2177" Date: Thu, 7 Apr 2011 17:41:26 +0800 Message-ID: <1302169286.1922.19.camel@cephhost> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Cc: To: ceph-devel Return-path: List-ID: Hi , I run iozone stress test on a ceph client for x86_64, ceph 0.26 + linux-2.6.39-rc1 server, printk "WARNING: at fs/btrfs/inode.c:2177" 1.log1 : ........................................................... [ 1663.370008] CE: hpet2 increased min_delta_ns to 7500 nsec [ 1663.375399] CE: hpet2 increased min_delta_ns to 11250 nsec [ 4945.270388] ------------[ cut here ]------------ [ 4945.275011] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 4945.283326] Hardware name: OptiPlex 780 [ 4945.288629] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 4945.320862] Pid: 581, comm: btrfs-transacti Not tainted 2.6.39-rc1 #1 [ 4945.327282] Call Trace: [ 4945.329722] [] warn_slowpath_common+0x7f/0xc0 [ 4945.335755] [] warn_slowpath_null+0x1a/0x20 [ 4945.341602] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 4945.348636] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 4945.355017] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 4945.362259] [] ? wake_up_bit+0x40/0x40 [ 4945.367649] [] transaction_kthread+0x283/0x290 [btrfs] [ 4945.374460] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 4945.381269] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 4945.388080] [] kthread+0x96/0xa0 [ 4945.392989] [] kernel_thread_helper+0x4/0x10 [ 4945.398895] [] ? __init_kthread_worker+0x40/0x40 [ 4945.405183] [] ? gs_change+0x13/0x13 [ 4945.410409] ---[ end trace 87e42fb6fdfeba78 ]--- [ 5159.980447] ------------[ cut here ]------------ [ 5159.985072] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5159.993353] Hardware name: OptiPlex 780 [ 5159.998648] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5160.033593] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5160.041904] Call Trace: [ 5160.045326] [] warn_slowpath_common+0x7f/0xc0 [ 5160.052312] [] warn_slowpath_null+0x1a/0x20 [ 5160.059102] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5160.067143] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5160.074485] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5160.082687] [] ? wake_up_bit+0x40/0x40 [ 5160.089034] [] transaction_kthread+0x283/0x290 [btrfs] [ 5160.096811] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5160.104568] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5160.112294] [] kthread+0x96/0xa0 [ 5160.118093] [] kernel_thread_helper+0x4/0x10 [ 5160.124964] [] ? __init_kthread_worker+0x40/0x40 [ 5160.132166] [] ? gs_change+0x13/0x13 [ 5160.138292] ---[ end trace 87e42fb6fdfeba79 ]--- [ 5434.340486] ------------[ cut here ]------------ [ 5434.346091] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5434.355303] Hardware name: OptiPlex 780 [ 5434.361640] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5434.396772] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5434.405087] Call Trace: [ 5434.408546] [] warn_slowpath_common+0x7f/0xc0 [ 5434.415523] [] warn_slowpath_null+0x1a/0x20 [ 5434.422300] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5434.430290] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5434.437562] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5434.445738] [] ? wake_up_bit+0x40/0x40 [ 5434.452087] [] transaction_kthread+0x283/0x290 [btrfs] [ 5434.459792] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5434.467542] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5434.475291] [] kthread+0x96/0xa0 [ 5434.481082] [] kernel_thread_helper+0x4/0x10 [ 5434.487949] [] ? __init_kthread_worker+0x40/0x40 [ 5434.495160] [] ? gs_change+0x13/0x13 [ 5434.501314] ---[ end trace 87e42fb6fdfeba7a ]--- [ 5525.450514] ------------[ cut here ]------------ [ 5525.456066] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5525.465286] Hardware name: OptiPlex 780 [ 5525.471543] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5525.506568] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5525.514879] Call Trace: [ 5525.518281] [] warn_slowpath_common+0x7f/0xc0 [ 5525.525251] [] warn_slowpath_null+0x1a/0x20 [ 5525.532037] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5525.540022] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5525.547277] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5525.555448] [] ? wake_up_bit+0x40/0x40 [ 5525.561794] [] transaction_kthread+0x283/0x290 [btrfs] [ 5525.569502] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5525.577240] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5525.584937] [] kthread+0x96/0xa0 [ 5525.590737] [] kernel_thread_helper+0x4/0x10 [ 5525.597541] [] ? __init_kthread_worker+0x40/0x40 [ 5525.604742] [] ? gs_change+0x13/0x13 [ 5525.610890] ---[ end trace 87e42fb6fdfeba7b ]--- [ 5525.616529] ------------[ cut here ]------------ [ 5525.622090] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5525.631338] Hardware name: OptiPlex 780 [ 5525.637564] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5525.672639] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5525.680962] Call Trace: [ 5525.684372] [] warn_slowpath_common+0x7f/0xc0 [ 5525.691350] [] warn_slowpath_null+0x1a/0x20 [ 5525.698109] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5525.706118] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5525.713891] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5525.722184] [] ? wake_up_bit+0x40/0x40 [ 5525.728576] [] transaction_kthread+0x283/0x290 [btrfs] [ 5525.736388] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5525.744113] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5525.751814] [] kthread+0x96/0xa0 [ 5525.757584] [] kernel_thread_helper+0x4/0x10 [ 5525.764431] [] ? __init_kthread_worker+0x40/0x40 [ 5525.771625] [] ? gs_change+0x13/0x13 [ 5525.777748] ---[ end trace 87e42fb6fdfeba7c ]--- [ 5586.710386] ------------[ cut here ]------------ [ 5586.715937] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5586.725153] Hardware name: OptiPlex 780 [ 5586.731407] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5586.766448] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5586.774812] Call Trace: [ 5586.778228] [] warn_slowpath_common+0x7f/0xc0 [ 5586.785203] [] warn_slowpath_null+0x1a/0x20 [ 5586.791974] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5586.799921] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5586.807285] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5586.815511] [] ? wake_up_bit+0x40/0x40 [ 5586.821875] [] transaction_kthread+0x283/0x290 [btrfs] [ 5586.829578] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5586.837318] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5586.845025] [] kthread+0x96/0xa0 [ 5586.850839] [] kernel_thread_helper+0x4/0x10 [ 5586.857641] [] ? __init_kthread_worker+0x40/0x40 [ 5586.864856] [] ? gs_change+0x13/0x13 [ 5586.871013] ---[ end trace 87e42fb6fdfeba7d ]--- [ 5617.300421] ------------[ cut here ]------------ [ 5617.306012] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5617.315227] Hardware name: OptiPlex 780 [ 5617.321585] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5617.356848] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5617.365158] Call Trace: [ 5617.368567] [] warn_slowpath_common+0x7f/0xc0 [ 5617.375756] [] warn_slowpath_null+0x1a/0x20 [ 5617.382535] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5617.390519] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5617.397774] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5617.405957] [] ? wake_up_bit+0x40/0x40 [ 5617.412291] [] transaction_kthread+0x283/0x290 [btrfs] [ 5617.420156] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5617.427930] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5617.435720] [] kthread+0x96/0xa0 [ 5617.441578] [] kernel_thread_helper+0x4/0x10 [ 5617.448432] [] ? __init_kthread_worker+0x40/0x40 [ 5617.455691] [] ? gs_change+0x13/0x13 [ 5617.461847] ---[ end trace 87e42fb6fdfeba7e ]--- [ 5678.310579] ------------[ cut here ]------------ [ 5678.316119] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 5678.325325] Hardware name: OptiPlex 780 [ 5678.331580] Modules linked in: i915 fbcon tileblit font snd_hda_codec_analog bitblit btrfs softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd zlib_deflate psmouse crc32c i2c_algo_bit soundcore snd_page_alloc libcrc32c ppdev intel_agp parport_pc lp intel_gtt dell_wmi video parport serio_raw sparse_keymap dcdbas r8169 mii [ 5678.366629] Pid: 581, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [ 5678.374945] Call Trace: [ 5678.378350] [] warn_slowpath_common+0x7f/0xc0 [ 5678.385319] [] warn_slowpath_null+0x1a/0x20 [ 5678.392107] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 5678.400095] [] commit_fs_roots+0xa1/0x140 [btrfs] [ 5678.407357] [] btrfs_commit_transaction +0x349/0x750 [btrfs] [ 5678.415611] [] ? wake_up_bit+0x40/0x40 [ 5678.422001] [] transaction_kthread+0x283/0x290 [btrfs] [ 5678.429753] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5678.437559] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 5678.445286] [] kthread+0x96/0xa0 [ 5678.451078] [] kernel_thread_helper+0x4/0x10 [ 5678.457889] [] ? __init_kthread_worker+0x40/0x40 [ 5678.465112] [] ? gs_change+0x13/0x13 [ 5678.471264] ---[ end trace 87e42fb6fdfeba 2 log2 .......................................................... [ 60.920012] CE: hpet5 increased min_delta_ns to 11250 nsec [ 60.920016] hrtimer: interrupt took 4156 ns [ 883.170006] CE: hpet4 increased min_delta_ns to 7500 nsec [ 883.170013] CE: hpet4 increased min_delta_ns to 11250 nsec [ 2118.980008] CE: hpet3 increased min_delta_ns to 7500 nsec [ 2118.980016] CE: hpet3 increased min_delta_ns to 11250 nsec [ 6794.650771] [ 6794.650774] ============================================= [ 6794.657667] [ INFO: possible recursive locking detected ] [ 6794.660144] 2.6.39-rc1 #1 [ 6794.660144] --------------------------------------------- [ 6794.660144] cosd/2100 is trying to acquire lock: [ 6794.660144] (&(&eb->lock)->rlock){+.+...}, at: [] btrfs_try_spin_lock+0x59/0x100 [btrfs] [ 6794.660144] [ 6794.660144] but task is already holding lock: [ 6794.660144] (&(&eb->lock)->rlock){+.+...}, at: [] btrfs_clear_lock_blocking+0x22/0x30 [btrfs] [ 6794.660144] [ 6794.660144] other info that might help us debug this: [ 6794.660144] 2 locks held by cosd/2100: [ 6794.660144] #0: (&sb->s_type->i_mutex_key#13){+.+.+.}, at: [] btrfs_file_aio_write+0xe2/0x4e0 [btrfs] [ 6794.660144] #1: (&(&eb->lock)->rlock){+.+...}, at: [] btrfs_clear_lock_blocking+0x22/0x30 [btrfs] [ 6794.660144] [ 6794.660144] stack backtrace: [ 6794.660144] Pid: 2100, comm: cosd Not tainted 2.6.39-rc1 #1 [ 6794.660144] Call Trace: [ 6794.660144] [] __lock_acquire+0x1154/0x14b0 [ 6794.660144] [] lock_acquire+0xa0/0x150 [ 6794.660144] [] ? btrfs_try_spin_lock+0x59/0x100 [btrfs] [ 6794.660144] [] _raw_spin_lock+0x31/0x40 [ 6794.660144] [] ? btrfs_try_spin_lock+0x59/0x100 [btrfs] [ 6794.660144] [] ? btrfs_clear_lock_blocking +0x22/0x30 [btrfs] [ 6794.660144] [] btrfs_try_spin_lock+0x59/0x100 [btrfs] [ 6794.660144] [] btrfs_search_slot+0x7d2/0x850 [btrfs] [ 6794.660144] [] btrfs_lookup_xattr+0x8f/0x120 [btrfs] [ 6794.660144] [] ? kmem_cache_alloc+0xe5/0x140 [ 6794.660144] [] __btrfs_getxattr+0x73/0x130 [btrfs] [ 6794.660144] [] btrfs_getxattr+0x7d/0x80 [btrfs] [ 6794.660144] [] cap_inode_need_killpriv+0x2d/0x40 [ 6794.660144] [] security_inode_need_killpriv +0x16/0x20 [ 6794.660144] [] file_remove_suid+0x2c/0x90 [ 6794.660144] [] ? mutex_lock_nested+0x43/0x50 [ 6794.660144] [] btrfs_file_aio_write+0x198/0x4e0 [btrfs] [ 6794.660144] [] ? __btrfs_buffered_write +0x310/0x310 [btrfs] [ 6794.660144] [] do_sync_readv_writev+0xd3/0x110 [ 6794.660144] [] ? apparmor_file_permission +0x18/0x20 [ 6794.660144] [] ? security_file_permission +0x23/0x90 [ 6794.660144] [] do_readv_writev+0xd4/0x1e0 [ 6794.660144] [] ? fget_light+0x40/0x130 [ 6794.660144] [] ? trace_hardirqs_on+0xd/0x10 [ 6794.660144] [] vfs_writev+0x48/0x60 [ 6794.660144] [] sys_writev+0x51/0xc0 [ 6794.660144] [] system_call_fastpath+0x16/0x1b [ 6823.410755] ------------[ cut here ]------------ [ 6823.416129] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [ 6823.425136] Hardware name: OptiPlex 780 [ 6823.431205] Modules linked in: btrfs i915 snd_hda_codec_analog fbcon zlib_deflate tileblit crc32c font bitblit libcrc32c softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd psmouse intel_agp i2c_algo_bit lp ppdev soundcore parport_pc snd_page_alloc intel_gtt dell_wmi parport video serio_raw sparse_keymap r8169 ata_piix mii [ 6823.465884] Pid: 580, comm: btrfs-transacti Not tainted 2.6.39-rc1 #1 [ 6823.473170] Call Trace: [ 6823.476439] [] warn_slowpath_common+0x7f/0xc0 [ 6823.483268] [] warn_slowpath_null+0x1a/0x20 [ 6823.489917] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [ 6823.497790] [] commit_fs_roots+0xa9/0x150 [btrfs] [ 6823.504951] [] btrfs_commit_transaction +0x34b/0x750 [btrfs] [ 6823.512976] [] ? wake_up_bit+0x40/0x40 [ 6823.519176] [] transaction_kthread+0x283/0x290 [btrfs] [ 6823.526763] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [ 6823.534354] [] kthread+0xb6/0xc0 [ 6823.539996] [] ? trace_hardirqs_on_caller +0x13d/0x180 [ 6823.547482] [] kernel_thread_helper+0x4/0x10 [ 6823.554183] [] ? retint_restore_args+0x13/0x13 [ 6823.561046] [] ? __init_kthread_worker+0x70/0x70 [ 6823.568085] [] ? gs_change+0x13/0x13 [ 6823.574077] ---[ end trace 98f2cdf99cfce110 ]--- [16334.260703] ------------[ cut here ]------------ [16334.266098] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [16334.275143] Hardware name: OptiPlex 780 [16334.281245] Modules linked in: btrfs i915 snd_hda_codec_analog fbcon zlib_deflate tileblit crc32c font bitblit libcrc32c softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd psmouse intel_agp i2c_algo_bit lp ppdev soundcore parport_pc snd_page_alloc intel_gtt dell_wmi parport video serio_raw sparse_keymap r8169 ata_piix mii [16334.316186] Pid: 580, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [16334.324378] Call Trace: [16334.327715] [] warn_slowpath_common+0x7f/0xc0 [16334.334668] [] warn_slowpath_null+0x1a/0x20 [16334.341452] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [16334.349448] [] commit_fs_roots+0xa9/0x150 [btrfs] [16334.356754] [] btrfs_commit_transaction +0x34b/0x750 [btrfs] [16334.364934] [] ? wake_up_bit+0x40/0x40 [16334.371300] [] transaction_kthread+0x283/0x290 [btrfs] [16334.379046] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [16334.386796] [] kthread+0xb6/0xc0 [16334.392625] [] ? trace_hardirqs_on_caller +0x13d/0x180 [16334.400305] [] kernel_thread_helper+0x4/0x10 [16334.407185] [] ? retint_restore_args+0x13/0x13 [16334.414251] [] ? __init_kthread_worker+0x70/0x70 [16334.421486] [] ? gs_change+0x13/0x13 [16334.427681] ---[ end trace 98f2cdf99cfce111 ]--- [16895.139537] btrfs: unlinked 27 orphans [20373.435695] btrfs: unlinked 1 orphans [23764.970722] ------------[ cut here ]------------ [23764.976339] WARNING: at fs/btrfs/inode.c:2177 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [23764.985578] Hardware name: OptiPlex 780 [23764.991863] Modules linked in: btrfs i915 snd_hda_codec_analog fbcon zlib_deflate tileblit crc32c font bitblit libcrc32c softcursor drm_kms_helper drm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd psmouse intel_agp i2c_algo_bit lp ppdev soundcore parport_pc snd_page_alloc intel_gtt dell_wmi parport video serio_raw sparse_keymap r8169 ata_piix mii [23765.027372] Pid: 580, comm: btrfs-transacti Tainted: G W 2.6.39-rc1 #1 [23765.035693] Call Trace: [23765.039130] [] warn_slowpath_common+0x7f/0xc0 [23765.046197] [] warn_slowpath_null+0x1a/0x20 [23765.053063] [] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [23765.061110] [] commit_fs_roots+0xa9/0x150 [btrfs] [23765.068443] [] btrfs_commit_transaction +0x34b/0x750 [btrfs] [23765.076646] [] ? wake_up_bit+0x40/0x40 [23765.083031] [] transaction_kthread+0x283/0x290 [btrfs] [23765.090826] [] ? btrfs_bio_wq_end_io+0x90/0x90 [btrfs] [23765.098603] [] kthread+0xb6/0xc0 [23765.104474] [] ? trace_hardirqs_on_caller +0x13d/0x180 [23765.112148] [] kernel_thread_helper+0x4/0x10 [23765.118995] [] ? retint_restore_args+0x13/0x13 [23765.126012] [] ? __init_kthread_worker+0x70/0x70 [23765.133209] [] ? gs_change+0x13/0x13 [23765.139359] ---[ end trace 98f2cdf99cfce112 ]--- Jeff ,Wu