linux-kernel - Re: [PATCH 2/3] cgroup: make css_rstat

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Message-ID: <oiwsbn4bo566rzxgcjkelufp657iog2hxiqthxow663cqh44dk@lev4vkh2emjb>
Date: Wed, 11 Jun 2025 06:56:48 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: JP Kobryn <inwardvessel@...il.com>
Cc: Johannes Weiner <hannes@...xchg.org>, 
	Andrew Morton <akpm@...ux-foundation.org>, Tejun Heo <tj@...nel.org>, Michal Hocko <mhocko@...nel.org>, 
	Roman Gushchin <roman.gushchin@...ux.dev>, Muchun Song <muchun.song@...ux.dev>, 
	Vlastimil Babka <vbabka@...e.cz>, Alexei Starovoitov <ast@...nel.org>, 
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>, Michal Koutný <mkoutny@...e.com>, 
	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: [PATCH 2/3] cgroup: make css_rstat_updated nmi safe

On Tue, Jun 10, 2025 at 10:23:51PM -0700, JP Kobryn wrote:
> 
> The subsystem per-cpu locks were used to synchronize updater and flusher
> on a given cpu. Since you no longer use them on the updater side, it
> seems these locks can be removed altogether.

Indeed you are right, thanks for the suggestion.