linux-kernel - Re: [PATCH] 2.6.23-rc6: Fix NUMA Memory Policy Reference Counting

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Message-Id: <200709180028.19462.ak@suse.de>
Date:	Tue, 18 Sep 2007 00:28:19 +0200
From:	Andi Kleen <ak@...e.de>
To:	Lee Schermerhorn <Lee.Schermerhorn@...com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org, clameter@....com, eric.whitney@...com,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH]  2.6.23-rc6:  Fix NUMA Memory Policy Reference Counting


> Handling policy ref counts for hugepages is a bit trickier.
> huge_zonelist() returns a zone list that might come from a 
> shared or vma 'BIND policy.  In this case, we should hold the
> reference until after the huge page allocation in 
> dequeue_hugepage().  The patch modifies huge_zonelist() to
> return a pointer to the mempolicy if it needs to be unref'd
> after allocation.

Acked-by: Andi Kleen <ak@...e.de>

Andrew, can you please queue that for .23?

-Andi
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