Hi
My volume ran out of space, and that seems to have triggered csum errors.
Kernel 4.9.83
% btrfs fi us /backup/
Overall:
Device size: 4.12TiB
Device allocated: 4.12TiB
Device unallocated: 2.00MiB
Device missing: 0.00B
Used: 4.12TiB
Free (estimated): 1.09MiB (min: 1.09MiB)
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 512.00MiB (used: 0.00B)
Data+Metadata,single: Size:4.12TiB, Used:4.12TiB
/dev/xvdf 1023.97GiB
/dev/xvdg 3.12TiB
System,single: Size:32.00MiB, Used:460.00KiB
/dev/xvdf 32.00MiB
Unallocated:
/dev/xvdf 1.00MiB
/dev/xvdg 1.00MiB
dmesg output :
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8076 at fs/btrfs/inode.c:4587
btrfs_truncate_inode_items+0xcd0/0xdd0 [btrfs]
BTRFS: Transaction aborted (error -28)
Modules linked in: dm_mod ipt_REJECT nf_reject_ipv4 xt_multiport
iptable_filter ip_tables x_tables evdev intel_rapl crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel snd_pcsp aesni_intel snd_pcm aes_x86_64
lrw snd_timer gf128mul glue_helper snd ablk_helper cryptd soundcore ext4
crc16 jbd2 mbcache btrfs xor raid6_pq xen_netfront xen_blkfront crc32c_intel
CPU: 0 PID: 8076 Comm: rsync Not tainted 4.9.83-dg1 #1
0000000000000000 ffffffff812ced74 ffffc900417f3c70 0000000000000000
ffffffff810759ce 0000000000000a16 ffffc900417f3cc0 ffff88018fe1a9a0
ffff8801c5672800 0000000000000000 0000000000000000 ffffffff81075a3f
Call Trace:
[<ffffffff812ced74>] ? dump_stack+0x5c/0x78
[<ffffffff810759ce>] ? __warn+0xbe/0xe0
[<ffffffff81075a3f>] ? warn_slowpath_fmt+0x4f/0x60
[<ffffffffa00b6420>] ? btrfs_truncate_inode_items+0xcd0/0xdd0 [btrfs]
[<ffffffffa00b6601>] ? btrfs_truncate+0xe1/0x2b0 [btrfs]
[<ffffffffa00b6f54>] ? btrfs_setattr+0x264/0x370 [btrfs]
[<ffffffff812004c2>] ? notify_change+0x2f2/0x440
[<ffffffff811e04ee>] ? do_truncate+0x5e/0x90
[<ffffffff811e08d7>] ? do_sys_ftruncate.constprop.13+0x117/0x180
[<ffffffff811e40f2>] ? SyS_write+0x42/0x90
[<ffffffff81003a3a>] ? do_syscall_64+0x6a/0xd0
[<ffffffff815860b8>] ? entry_SYSCALL_64_after_swapgs+0x42/0xb0
---[ end trace 856a9b15eaffabc5 ]---
BTRFS: error (device xvdg) in btrfs_truncate_inode_items:4587: errno=-28
No space left
BTRFS info (device xvdg): forced readonly
BTRFS error (device xvdg): pending csums is 344064
BTRFS error (device xvdg): parent transid verify failed on 3463283875840
wanted 715777 found 715775
BTRFS error (device xvdg): parent transid verify failed on 2650035322880
wanted 715777 found 715775
BTRFS info (device xvdg): no csum found for inode 39551584 start 0
...
Hopefully of help to someone fixing bugs....
Thanks
David.
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