linux-kernel - Re: [PATCH 13 of 66] export maybe

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Message-ID: <20110118203237.GF9506@random.random>
Date:	Tue, 18 Jan 2011 21:32:37 +0100
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	Michal Simek <monstr@...str.eu>
Cc:	linux-mm@...ck.org, Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Adam Litke <agl@...ibm.com>, Avi Kivity <avi@...hat.com>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Ingo Molnar <mingo@...e.hu>, Mike Travis <travis@....com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Chris Wright <chrisw@...s-sol.org>, bpicco@...hat.com,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Daisuke Nishimura <nishimura@....nes.nec.co.jp>,
	Chris Mason <chris.mason@...cle.com>,
	Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 13 of 66] export maybe_mkwrite

On Tue, Jan 18, 2011 at 03:29:42PM +0100, Michal Simek wrote:
> Of course: Look for example at this page:
> http://www.monstr.eu/wiki/doku.php?id=log:2011-01-18_11_51_49#linux_next

Ok now I see, the problem is the lack of pte_mkwrite with MMU=n.

So either we apply your patch or we move the maybe_mkwrite at the top
of huge_mm.h (before #ifdef CONFIG_TRANSPARENT_HUGEPAGE), it's up to
you...
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