linux-kernel - Re: [PATCH] memcg: Optimize exit to user space

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Message-ID: <87h5ya7w2n.ffs@tglx>
Date: Wed, 13 Aug 2025 23:25:52 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: Shakeel Butt <shakeel.butt@...ux.dev>
Cc: linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>, Peter Zijlstra
 <peterz@...radead.org>, Johannes Weiner <hannes@...xchg.org>, Michal Hocko
 <mhocko@...nel.org>, Roman Gushchin <roman.gushchin@...ux.dev>, Muchun
 Song <muchun.song@...ux.dev>, cgroups@...r.kernel.org, Andrew Morton
 <akpm@...ux-foundation.org>
Subject: Re: [PATCH] memcg: Optimize exit to user space

On Wed, Aug 13 2025 at 10:19, Shakeel Butt wrote:
> On Wed, Aug 13, 2025 at 04:57:55PM +0200, Thomas Gleixner wrote:
> Since this is seen in profiling data and it is simple enough, I think it
> is worth backporting to stable trees as well.

Your call.

> In the followup cleanup, we can remove the (!nr_pages) check inside
> __mem_cgroup_handle_over_high() as well.

Yes. I did not want to do that in one go, but that's an obvious follow
up.

Thanks,

        tglx