linux-kernel - Re: [PATCH] mm/memcontrol: respect zswap.writeback setting from parent cg too

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Message-Id: <20240815150819.9873910fa73a3f9f5e37ef4d@linux-foundation.org>
Date: Thu, 15 Aug 2024 15:08:19 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: Nhat Pham <nphamcs@...il.com>
Cc: Mike Yuan <me@...dnzj.com>, Yosry Ahmed <yosryahmed@...gle.com>,
 linux-kernel@...r.kernel.org, linux-mm@...ck.org, cgroups@...r.kernel.org,
 Muchun Song <muchun.song@...ux.dev>, Shakeel Butt <shakeel.butt@...ux.dev>,
 Roman Gushchin <roman.gushchin@...ux.dev>, Michal Hocko
 <mhocko@...nel.org>, Johannes Weiner <hannes@...xchg.org>
Subject: Re: [PATCH] mm/memcontrol: respect zswap.writeback setting from
 parent cg too

On Thu, 15 Aug 2024 12:12:26 -0700 Nhat Pham <nphamcs@...il.com> wrote:

> > Yeah, I thought about the other way around and reached the same
> > conclusion.
> > And there's permission boundary in the mix too - if root disables zswap
> > writeback for its cgroup, the subcgroups, which could possibly be owned
> > by other users, should not be able to reenable this.
> 
> Hmm yeah, I think I agree with your and Yosry's reasonings :) It
> doesn't affect our use case AFAICS, and the code looks solid to me,
> so:
> 
> Reviewed-by: Nhat Pham <nphamcs@...il.com>

But you'd still like an update to Documentation/admin-guide/cgroup-v2.rst?