linux-kernel - Re: [PATCH 0/9] memcg: cleanup per-cpu stock

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Message-Id: <20250315205759.c9f9cdfc2c20467e4106c41a@linux-foundation.org>
Date: Sat, 15 Mar 2025 20:57:59 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Shakeel Butt <shakeel.butt@...ux.dev>
Cc: Johannes Weiner <hannes@...xchg.org>, Michal Hocko <mhocko@...nel.org>,
 Roman Gushchin <roman.gushchin@...ux.dev>, Muchun Song
 <muchun.song@...ux.dev>, Vlastimil Babka <vbabka@...e.cz>, Sebastian
 Andrzej Siewior <bigeasy@...utronix.de>, linux-mm@...ck.org,
 cgroups@...r.kernel.org, linux-kernel@...r.kernel.org, Meta kernel team
 <kernel-team@...a.com>
Subject: Re: [PATCH 0/9] memcg: cleanup per-cpu stock

On Sat, 15 Mar 2025 10:49:21 -0700 Shakeel Butt <shakeel.butt@...ux.dev> wrote:

> 
> This is a cleanup series which is trying to simplify the memcg per-cpu
> stock code, particularly it tries to remove unnecessary dependencies on
> local_lock of per-cpu memcg stock. The eight patch from Vlastimil
> optimizes the charge path by combining the charging and accounting.
> 
> This series is based on next-20250314 plus two following patches:
> 
> Link: https://lore.kernel.org/all/20250312222552.3284173-1-shakeel.butt@linux.dev/
> Link: https://lore.kernel.org/all/20250313054812.2185900-1-shakeel.butt@linux.dev/

Unfortunately the bpf tree has been making changes in the same area of
memcontrol.c.  01d37228d331 ("memcg: Use trylock to access memcg
stock_lock.")

Sigh.  We're at -rc7 and I don't think it's worth working around that
for a cleanup series.  So I'm inclined to just defer this series until
the next -rc cycle.

If BPF merges reasonably early in the next merge window then please
promptly send this along and I should be able to squeak it into
6.15-rc1.