linux-kernel - Re: [patch -mm] oom: fix constraint deadlock

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Message-ID: <Pine.LNX.4.64.0704270018100.5200@chino.kir.corp.google.com>
Date:	Fri, 27 Apr 2007 00:19:43 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Andi Kleen <ak@...e.de>, Nick Piggin <npiggin@...e.de>,
	Christoph Lameter <clameter@...r.sgi.com>,
	"Martin J. Bligh" <mbligh@...igh.org>, linux-kernel@...r.kernel.org
Subject: Re: [patch -mm] oom: fix constraint deadlock

On Fri, 27 Apr 2007, Andrew Morton wrote:

> > Subject: [patch -mm] oom: fix constraint deadlock
> > Date: Thu, 26 Apr 2007 23:18:17 -0700 (PDT)
> > 
> > Fixes a deadlock in the OOM killer for allocations that are not
> > __GFP_HARDWALL.
> 
> Thanks.
> 
> Why is this described as "patch -mm"?  It applies to mainline.  If it's
> fixing a -mm patch, do you know which one?
> 

Fair enough.  It definitely is applicable to mainline and fixes a deadlock 
which we've been struggling with for awhile because not only does it block 
while holding callback_mutex, but also tasklist_lock.

Thanks.
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