From: Rik van Riel <riel@redhat.com>
Date: Tue, 10 Aug 2010 00:19:48 +0000 (-0700)
Subject: rmap: add exclusive page to private anon_vma on swapin
X-Git-Tag: v2.6.36-rc1~403
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad8c2ee801ad7a52d919b478d9b2c7b39a72d295;p=pandora-kernel.git

rmap: add exclusive page to private anon_vma on swapin

On swapin it is fairly common for a page to be owned exclusively by one
process.  In that case we want to add the page to the anon_vma of that
process's VMA, instead of to the root anon_vma.

This will reduce the amount of rmap searching that the swapout code needs
to do.

Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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