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Date: Mon, 9 Oct 2017 14:11:07 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
Subject: Re: [v11 2/6] mm: implement mem_cgroup_scan_tasks() for the root
 memory cgroup
In-Reply-To: <20171005130454.5590-3-guro@fb.com>
Message-ID: <alpine.DEB.2.10.1710091410550.59643@chino.kir.corp.google.com>
References: <20171005130454.5590-1-guro@fb.com> <20171005130454.5590-3-guro@fb.com>
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To: Roman Gushchin <guro@fb.com>
Cc: linux-mm@kvack.org, Vladimir Davydov <vdavydov.dev@gmail.com>, Johannes Weiner <hannes@cmpxchg.org>, Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>, Andrew Morton <akpm@linux-foundation.org>, Tejun Heo <tj@kernel.org>, kernel-team@fb.com, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org

On Thu, 5 Oct 2017, Roman Gushchin wrote:

> Implement mem_cgroup_scan_tasks() functionality for the root
> memory cgroup to use this function for looking for a OOM victim
> task in the root memory cgroup by the cgroup-ware OOM killer.
> 
> The root memory cgroup is treated as a leaf cgroup, so only tasks
> which are directly belonging to the root cgroup are iterated over.
> 
> This patch doesn't introduce any functional change as
> mem_cgroup_scan_tasks() is never called for the root memcg.
> This is preparatory work for the cgroup-aware OOM killer,
> which will use this function to iterate over tasks belonging
> to the root memcg.
> 
> Signed-off-by: Roman Gushchin <guro@fb.com>

Acked-by: David Rientjes <rientjes@google.com>

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