Hello,
I'm seeing a lot of warnings in dmesg with a BTRFS filesystem. I'm using
the 3.1 kernel, I found a patch for these warnings (
http://marc.info/?l=linux-btrfs&m=131547325515336&w=2)
<http://marc.info/?l=linux-btrfs&m=131547325515336&w=2>, but that patch
has already been included in 3.1. Are there any other patches I can try?
I'm using BTRFS in combination with Ceph and it looks like after a while
with a high rsync workload that the IO stalls for some time, could the
warnings result in IO stall?
Kind regards,
Stefan Kleijkers
Output of dmesg:
[ 3924.297754] ------------[ cut here ]------------
[ 3924.297772] WARNING: at fs/btrfs/inode.c:2198
btrfs_orphan_commit_root+0xa8/0xc0 [btrfs]()
[ 3924.297774] Hardware name: X8ST3
[ 3924.297776] Modules linked in: nfs lockd nfs_acl sunrpc btrfs
zlib_deflate lzo_compress md_mod target_core_mod configfs ahci libahci
e1000e mptsas mptscsih mptbase i7core_edac scsi_transport_sas bnx2
i5000_edac edac_core ipmi_devintf ipmi_msghandler
[ 3924.297793] Pid: 7672, comm: kworker/2:1 Not tainted
3.1.0-un13.1-64-nohz #1
[ 3924.297795] Call Trace:
[ 3924.297802] [<ffffffff81036dca>] warn_slowpath_common+0x7a/0xb0
[ 3924.297806] [<ffffffff81036e15>] warn_slowpath_null+0x15/0x20
[ 3924.297816] [<ffffffffa0137478>] btrfs_orphan_commit_root+0xa8/0xc0
[btrfs]
[ 3924.297825] [<ffffffffa012bc54>] commit_fs_roots+0xc4/0x1b0 [btrfs]
[ 3924.297835] [<ffffffffa012cc1e>]
btrfs_commit_transaction+0x3be/0x7e0 [btrfs]
[ 3924.297840] [<ffffffff813fa0fb>] ? __schedule+0x2fb/0x940
[ 3924.297845] [<ffffffff810a1f20>] ? refresh_cpu_vm_stats+0x150/0x150
[ 3924.297849] [<ffffffff81052840>] ? wake_up_bit+0x40/0x40
[ 3924.297858] [<ffffffffa012d040>] ?
btrfs_commit_transaction+0x7e0/0x7e0 [btrfs]
[ 3924.297868] [<ffffffffa012d05a>] do_async_commit+0x1a/0x30 [btrfs]
[ 3924.297873] [<ffffffff81350b70>] ? powersave_bias_target+0x170/0x170
[ 3924.297877] [<ffffffff8104e0bb>] process_one_work+0x10b/0x3d0
[ 3924.297880] [<ffffffff8104e7b6>] worker_thread+0x156/0x410
[ 3924.297884] [<ffffffff81029f59>] ? __wake_up_common+0x59/0x90
[ 3924.297887] [<ffffffff8104e660>] ? rescuer_thread+0x2e0/0x2e0
[ 3924.297890] [<ffffffff810523b6>] kthread+0x96/0xa0
[ 3924.297893] [<ffffffff813feaf4>] kernel_thread_helper+0x4/0x10
[ 3924.297896] [<ffffffff81052320>] ? kthread_worker_fn+0x130/0x130
[ 3924.297898] [<ffffffff813feaf0>] ? gs_change+0xb/0xb
[ 3924.297901] ---[ end trace 67e9a1054a2684f7 ]---
[ 4033.512469] ------------[ cut here ]------------
[ 4033.512496] WARNING: at fs/btrfs/inode.c:2198
btrfs_orphan_commit_root+0xa8/0xc0 [btrfs]()
[ 4033.512500] Hardware name: X8ST3
[ 4033.512502] Modules linked in: nfs lockd nfs_acl sunrpc btrfs
zlib_deflate lzo_compress md_mod target_core_mod configfs ahci libahci
e1000e mptsas mptscsih mptbase i7core_edac scsi_transport_sas bnx2
i5000_edac edac_core ipmi_devintf ipmi_msghandler
[ 4033.512531] Pid: 8, comm: kworker/1:0 Tainted: G W
3.1.0-un13.1-64-nohz #1
[ 4033.512535] Call Trace:
[ 4033.512546] [<ffffffff81036dca>] warn_slowpath_common+0x7a/0xb0
[ 4033.512551] [<ffffffff81036e15>] warn_slowpath_null+0x15/0x20
[ 4033.512570] [<ffffffffa0137478>] btrfs_orphan_commit_root+0xa8/0xc0
[btrfs]
[ 4033.512586] [<ffffffffa012bc54>] commit_fs_roots+0xc4/0x1b0 [btrfs]
[ 4033.512604] [<ffffffffa012cc1e>]
btrfs_commit_transaction+0x3be/0x7e0 [btrfs]
[ 4033.512611] [<ffffffff813fa0fb>] ? __schedule+0x2fb/0x940
[ 4033.512618] [<ffffffff810a1f20>] ? refresh_cpu_vm_stats+0x150/0x150
[ 4033.512625] [<ffffffff81052840>] ? wake_up_bit+0x40/0x40
[ 4033.512641] [<ffffffffa012d040>] ?
btrfs_commit_transaction+0x7e0/0x7e0 [btrfs]
[ 4033.512669] [<ffffffffa012d05a>] do_async_commit+0x1a/0x30 [btrfs]
[ 4033.512681] [<ffffffff81350b70>] ? powersave_bias_target+0x170/0x170
[ 4033.512693] [<ffffffff8104e0bb>] process_one_work+0x10b/0x3d0
[ 4033.512702] [<ffffffff8104e7b6>] worker_thread+0x156/0x410
[ 4033.512713] [<ffffffff81029f59>] ? __wake_up_common+0x59/0x90
[ 4033.512722] [<ffffffff8104e660>] ? rescuer_thread+0x2e0/0x2e0
[ 4033.512731] [<ffffffff810523b6>] kthread+0x96/0xa0
[ 4033.512740] [<ffffffff813feaf4>] kernel_thread_helper+0x4/0x10
[ 4033.512749] [<ffffffff81052320>] ? kthread_worker_fn+0x130/0x130
[ 4033.512757] [<ffffffff813feaf0>] ? gs_change+0xb/0xb
[ 4033.512764] ---[ end trace 67e9a1054a2684f8 ]---
[ 4450.920336] ------------[ cut here ]------------
[ 4450.920364] WARNING: at fs/btrfs/inode.c:2198
btrfs_orphan_commit_root+0xa8/0xc0 [btrfs]()
[ 4450.920368] Hardware name: X8ST3
[ 4450.920370] Modules linked in: nfs lockd nfs_acl sunrpc btrfs
zlib_deflate lzo_compress md_mod target_core_mod configfs ahci libahci
e1000e mptsas mptscsih mptbase i7core_edac scsi_transport_sas bnx2
i5000_edac edac_core ipmi_devintf ipmi_msghandler
[ 4450.920399] Pid: 7717, comm: kworker/3:2 Tainted: G W
3.1.0-un13.1-64-nohz #1
[ 4450.920402] Call Trace:
[ 4450.920413] [<ffffffff81036dca>] warn_slowpath_common+0x7a/0xb0
[ 4450.920419] [<ffffffff81036e15>] warn_slowpath_null+0x15/0x20
[ 4450.920437] [<ffffffffa0137478>] btrfs_orphan_commit_root+0xa8/0xc0
[btrfs]
[ 4450.920454] [<ffffffffa012bc54>] commit_fs_roots+0xc4/0x1b0 [btrfs]
[ 4450.920471] [<ffffffffa012cc1e>]
btrfs_commit_transaction+0x3be/0x7e0 [btrfs]
[ 4450.920479] [<ffffffff813fa0fb>] ? __schedule+0x2fb/0x940
[ 4450.920486] [<ffffffff810a1f20>] ? refresh_cpu_vm_stats+0x150/0x150
[ 4450.920492] [<ffffffff81052840>] ? wake_up_bit+0x40/0x40
[ 4450.920509] [<ffffffffa012d040>] ?
btrfs_commit_transaction+0x7e0/0x7e0 [btrfs]
[ 4450.920526] [<ffffffffa012d05a>] do_async_commit+0x1a/0x30 [btrfs]
[ 4450.920534] [<ffffffff81350b70>] ? powersave_bias_target+0x170/0x170
[ 4450.920541] [<ffffffff8104e0bb>] process_one_work+0x10b/0x3d0
[ 4450.920546] [<ffffffff8104e7b6>] worker_thread+0x156/0x410
[ 4450.920553] [<ffffffff81029f59>] ? __wake_up_common+0x59/0x90
[ 4450.920558] [<ffffffff8104e660>] ? rescuer_thread+0x2e0/0x2e0
[ 4450.920563] [<ffffffff810523b6>] kthread+0x96/0xa0
[ 4450.920568] [<ffffffff813feaf4>] kernel_thread_helper+0x4/0x10
[ 4450.920573] [<ffffffff81052320>] ? kthread_worker_fn+0x130/0x130
[ 4450.920578] [<ffffffff813feaf0>] ? gs_change+0xb/0xb
[ 4450.920581] ---[ end trace 67e9a1054a2684f9 ]---
[ 5280.880652] ------------[ cut here ]------------
[ 5280.880680] WARNING: at fs/btrfs/inode.c:2198
btrfs_orphan_commit_root+0xa8/0xc0 [btrfs]()
[ 5280.880684] Hardware name: X8ST3
[ 5280.880686] Modules linked in: nfs lockd nfs_acl sunrpc btrfs
zlib_deflate lzo_compress md_mod target_core_mod configfs ahci libahci
e1000e mptsas mptscsih mptbase i7core_edac scsi_transport_sas bnx2
i5000_edac edac_core ipmi_devintf ipmi_msghandler
[ 5280.880714] Pid: 7645, comm: kworker/0:2 Tainted: G W
3.1.0-un13.1-64-nohz #1
[ 5280.880718] Call Trace:
[ 5280.880729] [<ffffffff81036dca>] warn_slowpath_common+0x7a/0xb0
[ 5280.880735] [<ffffffff81036e15>] warn_slowpath_null+0x15/0x20
[ 5280.880753] [<ffffffffa0137478>] btrfs_orphan_commit_root+0xa8/0xc0
[btrfs]
[ 5280.880770] [<ffffffffa012bc54>] commit_fs_roots+0xc4/0x1b0 [btrfs]
[ 5280.880787] [<ffffffffa012cc1e>]
btrfs_commit_transaction+0x3be/0x7e0 [btrfs]
[ 5280.880795] [<ffffffff813fa0fb>] ? __schedule+0x2fb/0x940
[ 5280.880802] [<ffffffff8104d698>] ? queue_delayed_work_on+0x78/0x110
[ 5280.880807] [<ffffffff81052840>] ? wake_up_bit+0x40/0x40
[ 5280.880824] [<ffffffffa012d040>] ?
btrfs_commit_transaction+0x7e0/0x7e0 [btrfs]
[ 5280.880841] [<ffffffffa012d05a>] do_async_commit+0x1a/0x30 [btrfs]
[ 5280.880847] [<ffffffff8104e0bb>] process_one_work+0x10b/0x3d0
[ 5280.880853] [<ffffffff8104e7b6>] worker_thread+0x156/0x410
[ 5280.880859] [<ffffffff81029f59>] ? __wake_up_common+0x59/0x90
[ 5280.880865] [<ffffffff8104e660>] ? rescuer_thread+0x2e0/0x2e0
[ 5280.880869] [<ffffffff810523b6>] kthread+0x96/0xa0
[ 5280.880875] [<ffffffff813feaf4>] kernel_thread_helper+0x4/0x10
[ 5280.880880] [<ffffffff81052320>] ? kthread_worker_fn+0x130/0x130
[ 5280.880885] [<ffffffff813feaf0>] ? gs_change+0xb/0xb
[ 5280.880888] ---[ end trace 67e9a1054a2684fa ]---
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