linux-kernel - Re: [PATCH] pagemap: fix order of pmd_trans_unstable() and pmd_trans_huge

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Date:	Thu, 29 Mar 2012 18:53:01 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Sasha Levin <levinsasha928@...il.com>,
	Hugh Dickins <hughd@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: [PATCH] pagemap: fix order of pmd_trans_unstable() and pmd_trans_huge_lock()

(3/29/2012 16:25), Andrea Arcangeli wrote:
> Hi,
> 
> On Thu, Mar 29, 2012 at 04:41:41AM -0400, Naoya Horiguchi wrote:
>> pmd_trans_unstable() in pagemap_pte_range() comes before pmd_trans_huge_lock()
>> now, which means that pagewalk kicked by reading /proc/pid/pagemap does not
>> run over thp. This patch fixes it.
> 
> This should be fixed already.

Oh, you're right. Thanks.
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