linux-kernel - Re: [patch 1/2] arch: invoke oom-killer from page fault

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Date:	Wed, 5 Jun 2013 21:43:04 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Johannes Weiner <hannes@...xchg.org>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 1/2] arch: invoke oom-killer from page fault

On Thu, 6 Jun 2013, Johannes Weiner wrote:

> From: Johannes Weiner <hannes@...xchg.org>
> Subject: [patch] mm: invoke oom-killer from remaining unconverted page fault
>  handlers
> 
> A few remaining architectures directly kill the page faulting task in
> an out of memory situation.  This is usually not a good idea since
> that task might not even use a significant amount of memory and so may
> not be the optimal victim to resolve the situation.
> 
> Since '1c0fe6e mm: invoke oom-killer from page fault' (2.6.29) there
> is a hook that architecture page fault handlers are supposed to call
> to invoke the OOM killer and let it pick the right task to kill.
> Convert the remaining architectures over to this hook.
> 
> To have the previous behavior of simply taking out the faulting task
> the vm.oom_kill_allocating_task sysctl can be set to 1.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

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