linux-kernel - Re: [PATCH -v2 5/5] OOM, PM: make OOM detection in the freezer path raceless

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Message-ID: <20141207101118.GD15892@dhcp22.suse.cz>
Date:	Sun, 7 Dec 2014 11:11:18 +0100
From:	Michal Hocko <mhocko@...e.cz>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	"\\\"Rafael J. Wysocki\\\"" <rjw@...ysocki.net>,
	David Rientjes <rientjes@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, linux-pm@...r.kernel.org
Subject: Re: [PATCH -v2 5/5] OOM, PM: make OOM detection in the freezer path
 raceless

On Sat 06-12-14 08:11:15, Tejun Heo wrote:
> On Fri, Dec 05, 2014 at 05:41:47PM +0100, Michal Hocko wrote:
> > 5695be142e20 (OOM, PM: OOM killed task shouldn't escape PM suspend)
> > has left a race window when OOM killer manages to note_oom_kill after
> > freeze_processes checks the counter. The race window is quite small and
> > really unlikely and partial solution deemed sufficient at the time of
> > submission.
> 
> This patch doesn't apply on top of v3.18-rc3, latest mainline, -mm or
> -next.  Did I miss something?  Can you please check the patch?

The original cover letter which didn't make it to the mailing list has
mentioned that. I have reposted it now. Anyway this is on top of
http://marc.info/?l=linux-kernel&m=141779091114777 which hasn't landed
into -mm tree at the time I was posting this. Sorry about the confusion.

-- 
Michal Hocko
SUSE Labs
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