From: Andrea Cervesato via ltp <ltp@lists.linux.it>
To: "Wei Gao" <wegao@suse.com>
Cc: ltp@lists.linux.it
Subject: Re: [LTP] [PATCH v1] mmapstress06: Rate limit page-dirtying loop to prevent MemCG OOM-kills
Date: Wed, 26 Aug 2026 09:49:40 +0000 [thread overview]
Message-ID: <6a8eb6b5.9c218f23.39bd08.c61c@mx.google.com> (raw)
In-Reply-To: <ao6ygGRQfGejamJC@autotest-wegao.qe.prg2.suse.org>
> Thanks for the technical discussion, and we should find better solution
> for avoid oom, but on cgroupv2(does not support disabling the OOM killer)
> scenario, replacing sleep-based pacing with memory.reclaim is simply replacing
> one guess with another. In user-space, it is impossible to catch the exact
> second when memory hits memory.max. Furthermore, calling memory.reclaim proactively
> just guesses when to bypass memory.max altogether, which invalidates the
> core goal of the test.
Less LLM please :-)
The OOM killer can be disabled in v2, but only for a specific group.
If you don't want to use memory.reclaim in v2 / disable OOM killer in v1,
then we need to do things by hand as explained in the previous comment,
for both v1 and v2.
--
Andrea Cervesato
SUSE QE Automation Engineer Linux
andrea.cervesato@suse.com
--
Mailing list info: https://lists.linux.it/listinfo/ltp
next prev parent reply other threads:[~2026-08-26 9:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 2:13 [LTP] [PATCH v1] mmapstress06: Rate limit page-dirtying loop to prevent MemCG OOM-kills Wei Gao via ltp
2026-08-25 3:00 ` [LTP] " linuxtestproject.agent
2026-08-25 12:16 ` [LTP] [PATCH v1] " Andrea Cervesato via ltp
2026-08-26 7:13 ` Wei Gao via ltp
2026-08-26 7:58 ` Andrea Cervesato via ltp
2026-08-26 9:31 ` Wei Gao via ltp
2026-08-26 9:49 ` Andrea Cervesato via ltp [this message]
2026-08-26 13:38 ` Wei Gao via ltp
2026-08-27 8:06 ` Andrea Cervesato via ltp
2026-08-27 14:21 ` Cyril Hrubis
2026-09-01 2:04 ` Wei Gao via ltp
2026-09-01 7:38 ` Andrea Cervesato via ltp
2026-09-01 8:22 ` Wei Gao via ltp
2026-09-01 8:47 ` Cyril Hrubis
2026-09-02 2:57 ` [LTP] [PATCH v2] mmapstress06: Use memory.high in cgroup v2 to start swapping early Wei Gao via ltp
2026-09-02 8:28 ` [LTP] " linuxtestproject.agent
2026-09-04 8:53 ` [LTP] [PATCH v2] " Andrea Cervesato via ltp
2026-09-04 10:23 ` Cyril Hrubis
2026-09-04 10:43 ` Andrea Cervesato via ltp
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=6a8eb6b5.9c218f23.39bd08.c61c@mx.google.com \
--to=ltp@lists.linux.it \
--cc=andrea.cervesato@suse.com \
--cc=wegao@suse.com \
/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