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

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Message-ID: <alpine.DEB.2.00.1010281154150.26782@router.home>
Date:	Thu, 28 Oct 2010 11:55:18 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	Eric Dumazet <eric.dumazet@...il.com>, Mel Gorman <mel@....ul.ie>,
	Lee Schermerhorn <lee.schermerhorn@...com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	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, 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.
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