From: Michal Hocko <mhocko@suse.com>
To: Song Hu <husong@kylinos.cn>
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
hannes@cmpxchg.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, muchun.song@linux.dev, zhuhui@kylinos.cn,
joshua.hahnjy@gmail.com, audra@redhat.com,
bingfangguo@tencent.com
Subject: Re: [PATCH] mm: memcg: flush empty per-cpu stock slots on memcg offlining
Date: Mon, 17 Aug 2026 10:31:09 +0200 [thread overview]
Message-ID: <aoLGzZHS8kj53-ey@tiehlicka> (raw)
In-Reply-To: <20260817025917.66233-1-husong@kylinos.cn>
On Mon 17-08-26 10:59:17, Song Hu wrote:
> refill_stock() takes a css reference for each cached memcg slot and
> mem_cgroup_css_offline() relies on drain_all_stock() to release those
> references before the cgroup can finish dying.
>
> consume_stock() can drive a slot's nr_pages to zero while its cached[]
> pointer stays set.
Is there any specific reason why the memcg stays in the cache slot
without any pages?
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2026-08-17 8:31 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 2:59 [PATCH] mm: memcg: flush empty per-cpu stock slots on memcg offlining Song Hu
2026-08-17 3:15 ` Matthew Wilcox
2026-08-17 12:59 ` Song Hu
2026-08-17 4:30 ` Joshua Hahn
2026-08-17 13:02 ` Song Hu
2026-08-17 8:31 ` Michal Hocko [this message]
2026-08-17 13:12 ` Song Hu
2026-08-17 13:29 ` Michal Hocko
2026-08-17 13:58 ` Song Hu
2026-08-17 14:10 ` Michal Hocko
2026-08-17 16:11 ` Shakeel Butt
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=aoLGzZHS8kj53-ey@tiehlicka \
--to=mhocko@suse.com \
--cc=akpm@linux-foundation.org \
--cc=audra@redhat.com \
--cc=bingfangguo@tencent.com \
--cc=cgroups@vger.kernel.org \
--cc=hannes@cmpxchg.org \
--cc=husong@kylinos.cn \
--cc=joshua.hahnjy@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=muchun.song@linux.dev \
--cc=roman.gushchin@linux.dev \
--cc=shakeel.butt@linux.dev \
--cc=zhuhui@kylinos.cn \
/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