linux-kernel - Re: [PATCH] numa: fix slab_node(MPOL

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Message-Id: <20101028140725.755aea50.akpm@linux-foundation.org>
Date:	Thu, 28 Oct 2010 14:07:25 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Mel Gorman <mel@....ul.ie>,
	Lee Schermerhorn <lee.schermerhorn@...com>,
	Tejun Heo <tj@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Brian Gerst <brgerst@...il.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: [PATCH] numa: fix slab_node(MPOL_BIND)

On Thu, 28 Oct 2010 11:55:18 -0500 (CDT)
Christoph Lameter <cl@...ux.com> wrote:

> On Thu, 28 Oct 2010, Linus Torvalds wrote:
> 
> > And so does - although less obviously - mm/vmscan.c for the
> > wait_iff_confgested() thing.
> >
> > So are those buggy too, since first_zones_zonelist() can apparently return NULL?
> 
> The code is fine.
> 
> first_zones_zonelist() can only return NULL for the case that a nodemask
> was specified and the code in vmscan.c does not specify a nodemask.

Geeze, how did you work that out and how the heck was anyone else
supposed to know this :(

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