linux-kernel - Re: [patch 3/6] arch: mm: pass userspace fault flag to generic fault handler

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Message-ID: <20130726184500.GQ715@cmpxchg.org>
Date:	Fri, 26 Jul 2013 14:45:00 -0400
From:	Johannes Weiner <hannes@...xchg.org>
To:	Michal Hocko <mhocko@...e.cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	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
Subject: Re: [patch 3/6] arch: mm: pass userspace fault flag to generic fault
 handler

On Fri, Jul 26, 2013 at 03:19:47PM +0200, Michal Hocko wrote:
> On Thu 25-07-13 18:25:35, Johannes Weiner wrote:
> > Unlike global OOM handling, memory cgroup code will invoke the OOM
> > killer in any OOM situation because it has no way of telling faults
> > occuring in kernel context - which could be handled more gracefully -
> > from user-triggered faults.
> > 
> > Pass a flag that identifies faults originating in user space from the
> > architecture-specific fault handlers to generic code so that memcg OOM
> > handling can be improved.
> > 
> > Signed-off-by: Johannes Weiner <hannes@...xchg.org>
> 
> Looks good to me but I guess maintainers of the affected archs should be
> CCed

linux-arch is on CC, that should do the trick :)

> Reviewed-by: Michal Hocko <mhocko@...e.cz>

Thanks!
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