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SubjectRe: [PATCH 3/3] memcg: move page-freeing code outside of lock
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On Tue, Mar 22, 2011 at 8:34 AM, Namhyung Kim <namhyung@gmail.com> wrote:
>
> 2011-03-22 (화), 08:59 +0900, KAMEZAWA Hiroyuki:
> > On Fri, 18 Mar 2011 21:54:15 +0900
> > Namhyung Kim <namhyung@gmail.com> wrote:
> >
> > > Signed-off-by: Namhyung Kim <namhyung@gmail.com>
> > > Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> >
> > What is the benefit of this patch ?
> >
> > -Kame
> >
>
> Oh, I just thought generally it'd better call such a (potentially)
> costly function outside of locks and it could reduce few of theoretical
> contentions between swapons and/or offs. If it doesn't help any
> realistic cases I don't mind discarding it.

swapoff is a rare path, I would not worry about it too much at all.

Balbir
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