Re: [PATCH v5 2/4] selftests: cgroup: return -errno from cg_read()/cg_write() on failure

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To: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
Subject: Re: [PATCH v5 2/4] selftests: cgroup: return -errno from cg_read()/cg_write() on failure
From: David Rientjes <rientjes@xxxxxxxxxx>
Date: Mon, 25 Apr 2022 12:17:39 -0700 (PDT)
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxxxx>, Shakeel Butt <shakeelb@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Roman Gushchin <roman.gushchin@xxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, Zefan Li <lizefan.x@xxxxxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>, Yu Zhao <yuzhao@xxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Wei Xu <weixugc@xxxxxxxxxx>, Greg Thelen <gthelen@xxxxxxxxxx>, Chen Wandun <chenwandun@xxxxxxxxxx>, Vaibhav Jain <vaibhav@xxxxxxxxxxxxx>, Michal Koutný <mkoutny@xxxxxxxx>, Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>, cgroups@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx
In-reply-to: <20220425190040.2475377-3-yosryahmed@google.com>
References: <20220425190040.2475377-1-yosryahmed@google.com> <20220425190040.2475377-3-yosryahmed@google.com>

On Mon, 25 Apr 2022, Yosry Ahmed wrote:

> Currently, cg_read()/cg_write() returns 0 on success and -1 on failure.
> Modify them to return the -errno on failure.
> 
> Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx>
> Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

References:
- [PATCH v5 0/4] memcg: introduce per-memcg proactive reclaim
  - From: Yosry Ahmed
- [PATCH v5 2/4] selftests: cgroup: return -errno from cg_read()/cg_write() on failure
  - From: Yosry Ahmed

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