linux-kernel - Re: [PATCH 2/2] cgroup: explain the race between updater and flusher

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Message-ID: <edyai2zhaommoe6bqj6tggpp3eu5c6b4trv77vqmktjczkzcrd@ad55qjptzkd6>
Date: Fri, 4 Jul 2025 10:45:25 -0700
From: Shakeel Butt <shakeel.butt@...ux.dev>
To: "Paul E. McKenney" <paulmck@...nel.org>
Cc: Tejun Heo <tj@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, 
	JP Kobryn <inwardvessel@...il.com>, Johannes Weiner <hannes@...xchg.org>, 
	Ying Huang <huang.ying.caritas@...il.com>, Vlastimil Babka <vbabka@...e.cz>, 
	Alexei Starovoitov <ast@...nel.org>, Sebastian Andrzej Siewior <bigeasy@...utronix.de>, 
	Michal Koutný <mkoutny@...e.com>, 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 2/2] cgroup: explain the race between updater and flusher

On Thu, Jul 03, 2025 at 09:44:58PM -0700, Paul E. McKenney wrote:
[...]
> > 
> > Thanks a lot Paul for the awesome explanation. Do you think keeping
> > data_race() here would be harmful in a sense that it might cause
> > confusion in future?
> 
> Yes, plus it might incorrectly suppress a KCSAN warning for a very
> real bug.  So I strongly recommend removing the data_race() in this case.
> 

I will remove data_race() tags but keep the comments and squash into the
first one. I will keep your reviewed-by tag unless you disagree.

thanks,
Shakeel