From: Alexey Avramov <hakavlad@inbox.lv>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
mhocko@suse.com, vbabka@suse.cz, neilb@suse.de,
akpm@linux-foundation.org, corbet@lwn.net, riel@surriel.com,
hannes@cmpxchg.org, david@fromorbit.com, willy@infradead.org,
hdanton@sina.com, penguin-kernel@i-love.sakura.ne.jp,
oleksandr@natalenko.name, kernel@xanmod.org,
michael@michaellarabel.com, aros@gmx.com, hakavlad@gmail.com
Subject: Re: mm: 5.16 regression: reclaim_throttle leads to stall in near-OOM conditions
Date: Wed, 24 Nov 2021 21:03:20 +0900 [thread overview]
Message-ID: <20211124210320.591dd883@mail.inbox.lv> (raw)
In-Reply-To: <20211124115007.GG3366@techsingularity.net>
>but can you test this?
I have already tested different parameters, and
found that even zero timeout is unsatisfactory.
The introduction of reclaim_throttle() itself
dramatically worsens the stall in near-OOM.
More info:
https://lore.kernel.org/lkml/20211124011954.7cab9bb4@mail.inbox.lv/
What test else I should perform?
Okay, on one side of the scale is the use of the CPU, on the other
side is the risk of stall.
My dissatisfaction is caused by the fact that the scale has now
tipped sharply in favor of stall.
Although even before this change, users complained about the inability
to wait for OOM:
https://lore.kernel.org/lkml/d9802b6a-949b-b327-c4a6-3dbca485ec20@gmx.com/
next prev parent reply other threads:[~2021-11-24 12:06 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-23 16:19 mm: 5.16 regression: reclaim_throttle leads to stall in near-OOM conditions Alexey Avramov
2021-11-24 7:40 ` Thorsten Leemhuis
2021-11-24 10:35 ` Mel Gorman
2021-11-24 10:54 ` Alexey Avramov
2021-11-24 11:50 ` Mel Gorman
2021-11-24 12:03 ` Alexey Avramov [this message]
2021-11-24 12:44 ` Alexey Avramov
2021-11-24 14:33 ` Mel Gorman
2021-11-26 16:06 ` Alexey Avramov
2021-11-26 16:24 ` Mel Gorman
2021-12-20 8:50 ` Sultan Alsawaf
2021-11-27 19:37 ` Alexey Avramov
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=20211124210320.591dd883@mail.inbox.lv \
--to=hakavlad@inbox.lv \
--cc=akpm@linux-foundation.org \
--cc=aros@gmx.com \
--cc=corbet@lwn.net \
--cc=david@fromorbit.com \
--cc=hakavlad@gmail.com \
--cc=hannes@cmpxchg.org \
--cc=hdanton@sina.com \
--cc=kernel@xanmod.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mgorman@techsingularity.net \
--cc=mhocko@suse.com \
--cc=michael@michaellarabel.com \
--cc=neilb@suse.de \
--cc=oleksandr@natalenko.name \
--cc=penguin-kernel@i-love.sakura.ne.jp \
--cc=riel@surriel.com \
--cc=vbabka@suse.cz \
--cc=willy@infradead.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).