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From: Roman Gushchin <roman.gushchin@linux.dev>
To: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: linux-mm@kvack.org,  jiayuan.chen@shopee.com,  Johannes Weiner
 <hannes@cmpxchg.org>,  Michal Hocko <mhocko@kernel.org>,  Shakeel Butt
 <shakeel.butt@linux.dev>,  Muchun Song <muchun.song@linux.dev>,  Andrew
 Morton <akpm@linux-foundation.org>,  cgroups@vger.kernel.org,
  linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 2/2] mm: memcg: reset oom_group in css_reset
In-Reply-To: <20260703063826.306878-2-jiayuan.chen@linux.dev> (Jiayuan Chen's
	message of "Fri, 3 Jul 2026 14:38:24 +0800")
References: <20260703063826.306878-1-jiayuan.chen@linux.dev>
	<20260703063826.306878-2-jiayuan.chen@linux.dev>
Date: Mon, 06 Jul 2026 12:48:42 -0700
Message-ID: <877bn7nbl1.fsf@linux.dev>
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Jiayuan Chen <jiayuan.chen@linux.dev> writes:

> From: Jiayuan Chen <jiayuan.chen@shopee.com>
>
> memory.oom.group defaults to disabled, but css_reset did not clear
> memcg->oom_group when a disabled memory css is kept alive by another
> controller dependency.
>
> Reset it with the other memory controller policies so a hidden memcg
> cannot keep applying stale group OOM kill policy.
>
> Cc: Jiayuan Chen <jiayuan.chen@linux.dev>
> Signed-off-by: Jiayuan Chen <jiayuan.chen@shopee.com>

Acked-by: Roman Gushchin <roman.gushchin@linux.dev>

Thanks!