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Date: Wed, 21 Dec 2011 11:46:35 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH] mm: hugetlb: fix pgoff computation when unmapping page
 from vma
Message-Id: <20111221114635.5b866875.kamezawa.hiroyu@jp.fujitsu.com>
In-Reply-To: <CAJd=RBDC9hxAFbbTvSWVa=t1kuyBH8=UoTYxRDtDm6iXLGkQWg@mail.gmail.com>
References: <CAJd=RBDC9hxAFbbTvSWVa=t1kuyBH8=UoTYxRDtDm6iXLGkQWg@mail.gmail.com>
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To: Hillf Danton <dhillf@gmail.com>
Cc: Michal Hocko <mhocko@suse.cz>, Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>

On Tue, 20 Dec 2011 21:45:51 +0800
Hillf Danton <dhillf@gmail.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@suse.cz>
> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Signed-off-by: Hillf Danton <dhillf@gmail.com>

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

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