linux-kernel - Re: [PATCH v4] mm/vmscan: fix demotion targets checks in reclaim/demotion

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aVtHRi-D3iSb3ZkQ@google.com>
Date: Mon, 5 Jan 2026 05:08:22 +0000
From: Bing Jiao <bingjiao@...gle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, gourry@...rry.net,
	longman@...hat.com, hannes@...xchg.org, mhocko@...nel.org,
	roman.gushchin@...ux.dev, shakeel.butt@...ux.dev,
	muchun.song@...ux.dev, tj@...nel.org, mkoutny@...e.com,
	david@...nel.org, zhengqi.arch@...edance.com,
	lorenzo.stoakes@...cle.com, axelrasmussen@...gle.com,
	chenridong@...weicloud.com, yuanchu@...gle.com, weixugc@...gle.com,
	cgroups@...r.kernel.org, Akinobu Mita <akinobu.mita@...il.com>
Subject: Re: [PATCH v4] mm/vmscan: fix demotion targets checks in
 reclaim/demotion

On Sun, Jan 04, 2026 at 10:27:45AM -0800, Andrew Morton wrote:
> We'll want to fix these things in 6.16.X and later, but you've prepared
> this patch against "mm/vmscan: don't demote if there is not enough free
> memory in the lower memory tier", which is presently under test/review
> in mm.git's mm-unstable branch.
>
> This seems to be incorrect ordering - this fix should go ahead of
> Akinobu Mita's series "mm: fix oom-killer not being invoked when
> demotion is enabled v2".
>
> So can you please redo this patch against current mainline?  And please
> also review the "mm: fix oom-killer not being invoked when demotion is
> enabled" series to ensure that things will work together nicely when
> that time comes.

Hi Andrew,

Thank you for the detailed explanation. Patch v4 has been sent.

V4 is patched against the mainline. Tested on both the mainline and
mm-everything (after Akinobu Mita's series "mm: fix oom-killer not
being invoked when demotion is enabled v2"), and passed.

Best,
Bing