From: Kazuhisa Ichikawa <ki@epsilou.com>
Date: Sat, 16 Jan 2010 01:01:20 +0000 (-0800)
Subject: mm/page_alloc: fix the range check for backward merging
X-Git-Tag: v2.6.33-rc5~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d2dbe08ddceb4ba2b274abb84326d7e69d454e5c;p=pandora-kernel.git

mm/page_alloc: fix the range check for backward merging

The current check for 'backward merging' within add_active_range() does
not seem correct.  start_pfn must be compared against
early_node_map[i].start_pfn (and NOT against .end_pfn) to find out whether
the new region is backward-mergeable with the existing range.

Signed-off-by: Kazuhisa Ichikawa <ki@epsilou.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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