> Index: devel-2.6.23-rc8-mm2/mm/memcontrol.c
> ===================================================================
> --- devel-2.6.23-rc8-mm2.orig/mm/memcontrol.c
> +++ devel-2.6.23-rc8-mm2/mm/memcontrol.c
> @@ -469,6 +469,7 @@ void mem_cgroup_uncharge(struct page_cgr
>  		page = pc->page;
>  		/*
>  		 * get page->cgroup and clear it under lock.
> +		 * force-empty can drop page->cgroup without checking refcnt.

force_empty

> +	char buf[2] = "0";

it should be static const unless you want a runtime assignment.

YAMAMOTO Takashi
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