linux-kernel - Re: [patch v2] mm, memcg: do not retry precharge charges

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Date:   Sat, 14 Jan 2017 21:42:48 -0800 (PST)
From:   David Rientjes <rientjes@...gle.com>
To:     Johannes Weiner <hannes@...xchg.org>
cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [patch v2] mm, memcg: do not retry precharge charges

On Sat, 14 Jan 2017, Johannes Weiner wrote:

> The OOM killer livelock was the motivation for this patch. With that
> ruled out, what's the point of this patch? Try a bit less hard to move
> charges during task migration?
> 

Most important part is to fail ->can_attach() instead of oom killing 
processes when attaching a process to a memcg hierarchy.