linux-kernel - Re: [PATCH 3/3 -v2] Fix the wrong corrupted page information of hugetlb page.

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Date:	Fri, 21 Jan 2011 18:56:04 +0900
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Jin Dongming <jin.dongming@...css.fujitsu.com>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Huang Ying <ying.huang@...el.com>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	LKLM <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3 -v2] Fix the wrong corrupted page information of
 hugetlb page.

On Fri, Jan 21, 2011 at 05:17:36PM +0900, Jin Dongming wrote:
> When more than on tail page of the same mapped hugetlb page are
> poisoned at the same time, the sum of corrupted page should be
> the size of one hugetlb page(512 pages). But HardwareCorrupted
> information in /proc/meminfo is 1024 pages or more.
> 
> That is because when the above condition happened,
> __memory_failure() will be called many times and pages in hugetlb
> page are accounted more than one time.
> 
> This patch fixed it by incrementing the number of corrupted page
> one by one.
> 
> -v2 fix checking for "just unpoisoned".
> 
> Signed-off-by: Jin Dongming <jin.dongming@...css.fujitsu.com>
> Reviewed-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
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