linux-kernel - Re: [patch 2/6] arch: mm: do not invoke OOM killer on kernel fault OOM

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Message-ID: <51F6BB3D.6000700@gmail.com>
Date:	Mon, 29 Jul 2013 14:58:05 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Johannes Weiner <hannes@...xchg.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Michal Hocko <mhocko@...e.cz>,
	David Rientjes <rientjes@...gle.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	azurIt <azurit@...ox.sk>, linux-mm@...ck.org,
	cgroups@...r.kernel.org, x86@...nel.org,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	kosaki.motohiro@...il.com
Subject: Re: [patch 2/6] arch: mm: do not invoke OOM killer on kernel fault
 OOM

(7/25/13 6:25 PM), Johannes Weiner wrote:
> Kernel faults are expected to handle OOM conditions gracefully (gup,
> uaccess etc.), so they should never invoke the OOM killer.  Reserve
> this for faults triggered in user context when it is the only option.
> 
> Most architectures already do this, fix up the remaining few.
> 
> Signed-off-by: Johannes Weiner <hannes@...xchg.org>

OK. but now almost all arch have the same page fault handler. So, I think
we can implement arch generic page fault handler in future. Ah, ok, never
mind if you are not interest.

Acked-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>

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