From: Nick Piggin <npiggin@suse.de>
Date: Thu, 19 Jan 2006 01:42:27 +0000 (-0800)
Subject: [PATCH] mm: migration page refcounting fix
X-Git-Tag: v2.6.16-rc2~344
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=053837fce7aa79025ed57656855df09f80175527;p=pandora-kernel.git

[PATCH] mm: migration page refcounting fix

Migration code currently does not take a reference to target page
properly, so between unlocking the pte and trying to take a new
reference to the page with isolate_lru_page, anything could happen to
it.

Fix this by holding the pte lock until we get a chance to elevate the
refcount.

Other small cleanups while we're here.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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