I'm sorry that this patch needs following fix..
Andrew, could you apply this ?
(All version I sent has this bug....Sigh)

Thanks,
-Kame
==
Bugfix for memory cgroup skip !PageLRU page in mem_cgroup_isolate_pages

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

Index: devel-2.6.23-mm1/mm/memcontrol.c
===================================================================
--- devel-2.6.23-mm1.orig/mm/memcontrol.c
+++ devel-2.6.23-mm1/mm/memcontrol.c
@@ -260,7 +260,7 @@ unsigned long mem_cgroup_isolate_pages(u
 	spin_lock(&mem_cont->lru_lock);
 	scan = 0;
 	list_for_each_entry_safe_reverse(pc, tmp, src, lru) {
-		if (scan++ > nr_taken)
+		if (scan++ > nr_to_scan)
 			break;
 		page = pc->page;
 		VM_BUG_ON(!pc);

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