linux-kernel - Re: [PATCH] mm: hugetlb: fix pgoff computation when unmapping page from vma

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Message-Id: <20111221114635.5b866875.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 21 Dec 2011 11:46:35 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Hillf Danton <dhillf@...il.com>
Cc:	Michal Hocko <mhocko@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: hugetlb: fix pgoff computation when unmapping page
 from vma

On Tue, 20 Dec 2011 21:45:51 +0800
Hillf Danton <dhillf@...il.com> wrote:

> The computation for pgoff is incorrect, at least with
> 
> 	(vma->vm_pgoff >> PAGE_SHIFT)
> 
> involved. It is fixed with the available method if HPAGE_SIZE is concerned in
> page cache lookup.
> 
> Cc: Michal Hocko <mhocko@...e.cz>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Hillf Danton <dhillf@...il.com>

Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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