linux-kernel - Re: [RFC PATCH] memcg, oom: move out_of

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Message-ID: <20180620193836.GB4734@cmpxchg.org>
Date:   Wed, 20 Jun 2018 15:38:36 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-mm@...ck.org, Greg Thelen <gthelen@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] memcg, oom: move out_of_memory back to the charge
 path

On Wed, Jun 20, 2018 at 05:31:48PM +0200, Michal Hocko wrote:
> 	 * Please note that mem_cgroup_oom_synchronize might fail to find a
> 	 * victim and then we have rely on mem_cgroup_oom_synchronize otherwise
> 	 * we would fall back to the global oom killer in pagefault_out_of_memory

I can't quite figure out what this paragraph is trying to
say. "oom_synchronize might fail [...] and we have to rely on
oom_synchronize". Hm?