linux-kernel - Re: [RFC PATCH 2/7] memcg: move preempt disable to callers of memcg_rstat

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Message-ID: <b0daf778-85de-4a4d-b506-fab01ea0395f@suse.cz>
Date: Tue, 13 May 2025 12:34:27 +0200
From: Vlastimil Babka <vbabka@...e.cz>
To: Shakeel Butt <shakeel.butt@...ux.dev>,
 Andrew Morton <akpm@...ux-foundation.org>
Cc: Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...nel.org>,
 Roman Gushchin <roman.gushchin@...ux.dev>,
 Muchun Song <muchun.song@...ux.dev>, Alexei Starovoitov <ast@...nel.org>,
 Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
 Harry Yoo <harry.yoo@...cle.com>, Yosry Ahmed <yosry.ahmed@...ux.dev>,
 bpf@...r.kernel.org, linux-mm@...ck.org, cgroups@...r.kernel.org,
 linux-kernel@...r.kernel.org, Meta kernel team <kernel-team@...a.com>
Subject: Re: [RFC PATCH 2/7] memcg: move preempt disable to callers of
 memcg_rstat_updated

On 5/13/25 05:13, Shakeel Butt wrote:
> Let's move the explicit preempt disable code to the callers of
> memcg_rstat_updated and also remove the memcg_stats_lock and related
> functions which ensures the callers of stats update functions have
> disabled preemption because now the stats update functions are
> explicitly disabling preemption.
> 
> Signed-off-by: Shakeel Butt <shakeel.butt@...ux.dev>

A welcome cleanup!

Acked-by: Vlastimil Babka <vbabka@...e.cz>