linux-kernel - Re: [PATCH] MIPS/mm: add compound tail page

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Message-ID: <20120824132311.GG10439@linux-mips.org>
Date:	Fri, 24 Aug 2012 15:23:11 +0200
From:	Ralf Baechle <ralf@...ux-mips.org>
To:	Jovi Zhang <bookjovi@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	linux-mips@...ux-mips.org, Youquan Song <youquan.song@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>, stable@...r.kernel.org
Subject: Re: [PATCH] MIPS/mm: add compound tail page _mapcount when mapped

On Wed, Aug 22, 2012 at 11:02:34AM +0800, Jovi Zhang wrote:

> see commit b6999b191 which target for x86 mm/gup, let it align with
> mips architecture.
> 
> Quote from commit b6999b191:
>     "If compound pages are used and the page is a
>     tail page, gup_huge_pmd() increases _mapcount to record tail page are
>     mapped while gup_huge_pud does not do that."

Thanks, applied and also acked' for -stable.

Note the patch got linewrapped along the way but it's trivial enough to be
fixed up.

  Ralf
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