linux-kernel - Re: [PATCH 3/3] mm,migration: Remove straggling migration PTEs when page tables are being moved after the VMA has already moved

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Message-ID: <20100428013659.GL510@random.random>
Date:	Wed, 28 Apr 2010 03:36:59 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Mel Gorman <mel@....ul.ie>, Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 3/3] mm,migration: Remove straggling migration PTEs
 when page tables are being moved after the VMA has already moved

On Wed, Apr 28, 2010 at 10:18:58AM +0900, KAMEZAWA Hiroyuki wrote:
> BTW, page->index is not updated, we just keep [start_address, pgoff] to be
> sane value.

yes I corrected myself too, the end result is the same and adjusting
the new vma vm_pgoff available in the anon-vma list is obviously
faster and simpler. When the src and dst ranges don't overlap and
src_vma != dst_vma (vma, new_vma in code) things are a lot simpler
there...
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