linux-kernel - Re: [PATCH] mm: remove CONFIG_MEMCG

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Message-ID: <Zftk3tzC2btb3Ine@P9FQF9L96D>
Date: Wed, 20 Mar 2024 15:36:14 -0700
From: Roman Gushchin <roman.gushchin@...ux.dev>
To: Johannes Weiner <hannes@...xchg.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...nel.org>,
	Shakeel Butt <shakeel.butt@...ux.dev>,
	Muchun Song <muchun.song@...ux.dev>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: remove CONFIG_MEMCG_KMEM

On Wed, Mar 20, 2024 at 04:27:45PM -0400, Johannes Weiner wrote:
> CONFIG_MEMCG_KMEM used to be a user-visible option for whether slab
> tracking is enabled. It has been default-enabled and equivalent to
> CONFIG_MEMCG for almost a decade. We've only grown more kernel memory
> accounting sites since, and there is no imaginable cgroup usecase
> going forward that wants to track user pages but not the multitude of
> user-drivable kernel allocations.

I totally support it. I believe one of the reasons for it to exist
was SLOB, which hasn't been supporting the slab memory accounting.
No such reasons anymore.

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

Thanks!