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Date: Wed, 28 Apr 2010 03:36:59 +0200
From: Andrea Arcangeli <aarcange@redhat.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>, Linux-MM <linux-mm@kvack.org>,
       LKML <linux-kernel@vger.kernel.org>,
       Minchan Kim <minchan.kim@gmail.com>, Christoph Lameter <cl@linux.com>,
       Rik van Riel <riel@redhat.com>,
       Andrew Morton <akpm@linux-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
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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...