On 2018-12-04 14:59, Chris Murphy wrote:
Running 4.19.6 right now, but was experiencing the issue also with
4.18
kernels.
# btrfs device stats /data
[/dev/sda1].write_io_errs 0
[/dev/sda1].read_io_errs 0
[/dev/sda1].flush_io_errs 0
[/dev/sda1].corruption_errs 0
[/dev/sda1].generation_errs 0
Hard to say without a complete dmesg; but errno=-5 IO failure is
pretty much some kind of hardware problem in my experience. I haven't
seen it be a bug.
It is a complete dmesg - in sense:
# grep -i btrfs -A5 -B5 /var/log/syslog
Dec 4 05:06:56 step snapd[747]: udevmon.go:184: udev monitor observed
remove event for unknown device
"/sys/skbuff_head_cache(1481:anacron.service)"
Dec 4 05:06:56 step snapd[747]: udevmon.go:184: udev monitor observed
remove event for unknown device "/sys/buffer_head(1481:anacron.service)"
Dec 4 05:06:56 step snapd[747]: udevmon.go:184: udev monitor observed
remove event for unknown device
"/sys/ext4_inode_cache(1481:anacron.service)"
Dec 4 05:15:01 step CRON[9352]: (root) CMD (command -v debian-sa1 >
/dev/null && debian-sa1 1 1)
Dec 4 05:17:01 step CRON[9358]: (root) CMD ( cd / && run-parts
--report /etc/cron.hourly)
Dec 4 05:23:13 step kernel: [77760.444607] BTRFS error (device sdb1):
bad tree block start, want 378372096 have 0
Dec 4 05:23:13 step kernel: [77760.550933] BTRFS error (device sdb1):
bad tree block start, want 378372096 have 0
Dec 4 05:23:13 step kernel: [77760.550972] BTRFS: error (device sdb1)
in __btrfs_free_extent:6804: errno=-5 IO failure
Dec 4 05:23:13 step kernel: [77760.550979] BTRFS info (device sdb1):
forced readonly
Dec 4 05:23:13 step kernel: [77760.551003] BTRFS: error (device sdb1)
in btrfs_run_delayed_refs:2935: errno=-5 IO failure
Dec 4 05:23:13 step kernel: [77760.553223] BTRFS error (device sdb1):
pending csums is 4096
Dec 4 05:23:14 step postfix/pickup[8993]: 13BBE460F86: uid=0
from=<root@step>
Dec 4 05:23:14 step postfix/cleanup[9398]: 13BBE460F86:
message-id=<20181204052314.13BBE460F86@step>
Dec 4 05:23:14 step postfix/qmgr[2745]: 13BBE460F86: from=<root@step>,
size=404, nrcpt=1 (queue active)
Dec 4 05:23:14 step postfix/pickup[8993]: 40A964603EC: uid=0
from=<root@step>
[...some emails follow, usual CRON messages etc., but noting at all
generated by the kernel, no hardware issue reported...]
Tomasz Chmielewski
