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SubjectRe: [RFC PATCH] page_cgroup: Reduce allocation overhead for page_cgroup array for CONFIG_SPARSEMEM v4
On Mon 28-02-11 18:48:21, KAMEZAWA Hiroyuki wrote:
> On Mon, 28 Feb 2011 10:53:16 +0100
> > From e7a897a42b526620eb4afada2d036e1c9ff9e62a Mon Sep 17 00:00:00 2001
> > From: Michal Hocko <mhocko@suse.cz>
> > Date: Mon, 28 Feb 2011 10:43:12 +0100
> > Subject: [PATCH] page_cgroup array is never stored on reserved pages
> >
> > KAMEZAWA Hiroyuki noted that free_pages_cgroup doesn't have to check for
> > PageReserved because we never store the array on reserved pages
> > (neither alloc_pages_exact nor vmalloc use those pages).
> >
> > So we can replace the check by a BUG_ON.
> >
> > Signed-off-by: Michal Hocko <mhocko@suse.cz>
> > CC: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
>
> Thank you.
> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>

Thanks!

--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic


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