linux-kernel - Re: [PATCH v3 28/30 fix 1/2] mm: memcontrol: fix lruvec_stats->state

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Message-ID: <19a35b15-b7ce-40fc-8f6e-ed84cff84a17@linux.dev>
Date: Fri, 16 Jan 2026 11:27:46 +0800
From: Qi Zheng <qi.zheng@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: hannes@...xchg.org, hughd@...gle.com, mhocko@...e.com,
 roman.gushchin@...ux.dev, shakeel.butt@...ux.dev, muchun.song@...ux.dev,
 david@...nel.org, lorenzo.stoakes@...cle.com, ziy@...dia.com,
 harry.yoo@...cle.com, yosry.ahmed@...ux.dev, imran.f.khan@...cle.com,
 kamalesh.babulal@...cle.com, axelrasmussen@...gle.com, yuanchu@...gle.com,
 weixugc@...gle.com, chenridong@...weicloud.com, mkoutny@...e.com,
 hamzamahfooz@...ux.microsoft.com, apais@...ux.microsoft.com,
 lance.yang@...ux.dev, linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 cgroups@...r.kernel.org, Qi Zheng <zhengqi.arch@...edance.com>
Subject: Re: [PATCH v3 28/30 fix 1/2] mm: memcontrol: fix
 lruvec_stats->state_local reparenting



On 1/16/26 1:47 AM, Andrew Morton wrote:
> On Thu, 15 Jan 2026 18:41:38 +0800 Qi Zheng <qi.zheng@...ux.dev> wrote:
> 
>> From: Qi Zheng <zhengqi.arch@...edance.com>
>>
>> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
> 
> What was "fixed"?

[1/2] fixed the issue reported by 
https://lore.kernel.org/all/6967cd38.050a0220.58bed.0001.GAE@google.com/.

Previuosly, state_local was protected by ss_rstat_lock. Since
[PATCH v3 28/30] added a concurrent path, [2/2] changed state_local
to the atomic_long_t type for protection.

> 
> I queued this and [2/2] as squashable fixes against "mm: memcontrol:
> prepare for reparenting state_local".

Thanks!

>