I've received several kernel warnings over the last few weeks. I
checked on the #BTRFS irc channel and it was suggested that I post the
relevant information here to see if this was something that I should
be worried about.
[root@tawilliams ~]# uname -a
Linux tawilliams.williamstlr.net 4.1.6-201.fc22.x86_64 #1 SMP Fri Sep
4 17:49:24 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
[root@tawilliams ~]# btrfs --version
btrfs-progs v4.1
[root@tawilliams ~]# btrfs fi sh
Label: 'fedora' uuid: 1e37c117-d493-4d3e-a585-46b90de16569
Total devices 1 FS bytes used 3.70GiB
devid 1 size 47.31GiB used 6.04GiB path /dev/sda4
Label: none uuid: f9b38a56-44d4-4974-9640-95341bd8ae6a
Total devices 1 FS bytes used 424.23GiB
devid 1 size 931.51GiB used 428.04GiB path /dev/sdc1
Label: none uuid: 5266d71b-1d75-4b28-accc-95187f2d65a4
Total devices 1 FS bytes used 889.09GiB
devid 1 size 931.50GiB used 892.03GiB path /dev/sdb2
Label: 'tawilliams' uuid: 142b1866-f5e1-48b0-acd3-401e8eb4d219
Total devices 2 FS bytes used 1.10TiB
devid 1 size 1.82TiB used 1.16TiB path /dev/sdb1
devid 2 size 1.82TiB used 1.16TiB path /dev/sde
Label: 'fedora-server' uuid: a5a82150-7ff3-43d4-a86b-a7f9d2df3737
Total devices 1 FS bytes used 27.09GiB
devid 1 size 47.51GiB used 38.81GiB path /dev/sdd3
btrfs-progs v4.1
[root@tawilliams ~]# btrfs fi df /media/btrfs-raid1/
Data, RAID1: total=1.16TiB, used=1.10TiB
System, RAID1: total=32.00MiB, used=208.00KiB
Metadata, RAID1: total=5.00GiB, used=3.86GiB
GlobalReserve, single: total=512.00MiB, used=0.00B
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: ------------[ cut
here ]------------
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: WARNING: CPU: 0
PID: 544 at fs/btrfs/qgroup.c:1028
__qgroup_excl_accounting+0x1cf/0x260 [btrfs]()
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: Modules linked in:
nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter
ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute
bridg
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: CPU: 0 PID: 544
Comm: btrfs-cleaner Not tainted 4.1.6-201.fc22.x86_64 #1
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: Hardware name:
Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V
UEFI Release v1.0 11/26/2012
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: 0000000000000000
000000005a7148da ffff8800383f7b38 ffffffff81799a6d
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: 0000000000000000
0000000000000000 ffff8800383f7b78 ffffffff810a165a
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: 0000000000000000
ffff880036e71048 ffff880022079960 ffffffffffffc000
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: Call Trace:
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff81799a6d>] dump_stack+0x45/0x57
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff810a165a>] warn_slowpath_common+0x8a/0xc0
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff810a178a>] warn_slowpath_null+0x1a/0x20
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa01341af>] __qgroup_excl_accounting+0x1cf/0x260 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa01372ec>] btrfs_delayed_qgroup_accounting+0x2dc/0xc70
[btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00b6a67>] ? walk_up_proc+0xd7/0x500 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00ba85f>] btrfs_run_delayed_refs.part.68+0x20f/0x280
[btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00ba8e5>] btrfs_run_delayed_refs+0x15/0x30 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00cb68a>] btrfs_should_end_transaction+0x5a/0x60 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00b8c85>] btrfs_drop_snapshot+0x455/0x8a0 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa01276cc>] ? btrfs_kill_all_delayed_nodes+0x5c/0x110 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00df11f>] ? btrfs_run_defrag_inodes+0x29f/0x360 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00cbb82>] btrfs_clean_one_deleted_snapshot+0xb2/0x110
[btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00c3dc5>] cleaner_kthread+0xb5/0x1b0 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffffa00c3d10>] ? check_leaf+0x380/0x380 [btrfs]
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff810c0bf8>] kthread+0xd8/0xf0
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff810c0b20>] ? kthread_worker_fn+0x180/0x180
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff817a0422>] ret_from_fork+0x42/0x70
Sep 15 10:45:16 tawilliams.williamstlr.net kernel:
[<ffffffff810c0b20>] ? kthread_worker_fn+0x180/0x180
Sep 15 10:45:16 tawilliams.williamstlr.net kernel: ---[ end trace
e8c2f252933902d6 ]---
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