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Date:	Tue, 7 Oct 2014 08:45:31 -0400
From:	Linus Torvalds <>
To:	"Aneesh Kumar K.V" <>
Cc:	Mel Gorman <>, Hugh Dickins <>,
	Dave Jones <>,
	Al Viro <>,
	Linux Kernel <>,
	Rik van Riel <>,
	Ingo Molnar <>,
	Michel Lespinasse <>,
	"Kirill A. Shutemov" <>,
	Sasha Levin <>,
	Benjamin Herrenschmidt <>
Subject: Re: pipe/page fault oddness.

On Mon, Oct 6, 2014 at 3:18 PM, Aneesh Kumar K.V
<> wrote:
> Are we still looking at these options ? I could look at implementing the
> first option which will also enable us to free up one pte bit.

We definitely are. If you can test my patch (with the small follow-up
fix), and do the necessary changes for ppc64, that would be good.

I looked quickly at the ppc64 side, and it didn't look too painful.
Using pte_protnone() instead of pte_numa() should remove move lines
than it adds there too..

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