linux-kernel - Re: [PATCH] mm: Check if PTE is already allocated during page fault

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Message-ID: <4DA846BF.7020504@redhat.com>
Date:	Fri, 15 Apr 2011 09:23:11 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Mel Gorman <mgorman@...e.de>
CC:	akpm@...ux-foundation.org, Andrea Arcangeli <aarcange@...hat.com>,
	raz ben yehuda <raziebe@...il.com>,
	kosaki.motohiro@...fujitsu.com,
	lkml <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
	stable@...nel.org
Subject: Re: [PATCH] mm: Check if PTE is already allocated during page fault

On 04/15/2011 06:12 AM, Mel Gorman wrote:

> This patch simply re-adds the check normally done by pte_alloc_map to
> check if the PTE needs to be allocated before taking the page table
> lock. The effect is noticable in page_test from aim9.

> Reported-by: Raz Ben Yehuda<raziebe@...il.com>
> Signed-off-by: Mel Gorman<mgorman@...e.de>

Reviewed-by: Rik van Riel <riel@...hat.com>

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