From: "François-Xavier Thomas" <fx.thomas@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Massive I/O usage from btrfs-cleaner after upgrading to 5.16
Date: Mon, 17 Jan 2022 11:06:42 +0100 [thread overview]
Message-ID: <CAEwRaO4y3PPPUdwYjNDoB9m9CLzfd3DFFk2iK1X6OyyEWG5-mg@mail.gmail.com> (raw)
Hello all,
Just in case someone is having the same issue: Btrfs (in the
btrfs-cleaner process) is taking a large amount of disk IO after
upgrading to 5.16 on one of my volumes, and multiple other people seem
to be having the same issue, see discussion in [0].
[1] is a close-up screenshot of disk I/O history (blue line is write
ops, going from a baseline of some 10 ops/s to around 1k ops/s). I
downgraded from 5.16 to 5.15 in the middle, which immediately restored
previous performance.
Common options between affected people are: ssd, autodefrag. No error
in the logs, and no other issue aside from performance (the volume
works just fine for accessing data).
One person reports that SMART stats show a massive amount of blocks
being written; unfortunately I do not have historical data for that so
I cannot confirm, but this sounds likely given what I see on what
should be a relatively new SSD.
Any idea of what it could be related to?
François-Xavier
[0] https://www.reddit.com/r/btrfs/comments/s4nrzb/massive_performance_degradation_after_upgrading/
[1] https://imgur.com/oYhYat1
next reply other threads:[~2022-01-17 10:06 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-17 10:06 François-Xavier Thomas [this message]
2022-01-17 12:02 ` Massive I/O usage from btrfs-cleaner after upgrading to 5.16 Filipe Manana
2022-01-17 16:59 ` Filipe Manana
2022-01-17 21:37 ` François-Xavier Thomas
2022-01-19 9:44 ` François-Xavier Thomas
2022-01-19 10:13 ` Filipe Manana
2022-01-20 11:37 ` François-Xavier Thomas
2022-01-20 11:44 ` Filipe Manana
2022-01-20 12:02 ` François-Xavier Thomas
2022-01-20 12:45 ` Qu Wenruo
2022-01-20 12:55 ` Filipe Manana
2022-01-20 17:46 ` Filipe Manana
2022-01-20 18:21 ` François-Xavier Thomas
2022-01-21 10:49 ` Filipe Manana
2022-01-21 19:39 ` François-Xavier Thomas
2022-01-21 23:34 ` Qu Wenruo
2022-01-22 18:20 ` François-Xavier Thomas
2022-01-24 7:00 ` Qu Wenruo
2022-01-25 20:00 ` François-Xavier Thomas
2022-01-25 23:29 ` Qu Wenruo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAEwRaO4y3PPPUdwYjNDoB9m9CLzfd3DFFk2iK1X6OyyEWG5-mg@mail.gmail.com \
--to=fx.thomas@gmail.com \
--cc=linux-btrfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).