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Date: Mon, 12 Oct 2026 04:08:11 -0700
From: Shakeel Butt <shakeel.butt@linux.dev>
To: Mingyu He <mingyu.he@shopee.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@kernel.org>, 
	Roman Gushchin <roman.gushchin@linux.dev>, linux-mm@kvack.org, Muchun Song <muchun.song@linux.dev>, 
	Andrew Morton <akpm@linux-foundation.org>, Yosry Ahmed <yosry@kernel.org>, cgroups@vger.kernel.org, 
	linux-kernel@vger.kernel.org, littleswimmingwhale@gmail.com
Subject: Re: [PATCH] memcg: keep propagating stats updates to ancestors
Message-ID: <asy_L2s1TNcN7bOK@linux.dev>
References: <20260911032905.63683-1-mingyu.he@shopee.com>
 <aqRXqcynCx88D2QK@linux.dev>
 <CAAoBcuS=sqOAPFr9Gda9aTwuCMHMPzBMEee8qvPNHtNxrRWKuw@mail.gmail.com>
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On Mon, Oct 12, 2026 at 04:17:46PM +0800, Mingyu He wrote:
> Hi Shakeel,
> 
>   This came from a reproducible workload with a custom in-kernel consumer,

Please share your custom in-kernel consumer. Let's not make changes in the
kernel for things which are not in upstreame kernel.

[...]
> 
>   Regarding the BPF interface, the implementation in the tree I found is:
> 
>   __bpf_kfunc void bpf_mem_cgroup_flush_stats(struct mem_cgroup *memcg)
>   {
>           mem_cgroup_flush_stats(memcg);

Let's make this force flush.