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Message-Id: <20110725101657.21f85bf0.kamezawa.hiroyu@jp.fujitsu.com> Date: Mon, 25 Jul 2011 10:16:57 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: Michal Hocko <mhocko@...e.cz> Cc: linux-mm@...ck.org, Balbir Singh <bsingharora@...il.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org Subject: Re: [PATCH 1/4] memcg: do not try to drain per-cpu caches without pages On Thu, 21 Jul 2011 09:38:00 +0200 Michal Hocko <mhocko@...e.cz> wrote: > drain_all_stock_async tries to optimize a work to be done on the work > queue by excluding any work for the current CPU because it assumes that > the context we are called from already tried to charge from that cache > and it's failed so it must be empty already. > While the assumption is correct we can optimize it even more by checking > the current number of pages in the cache. This will also reduce a work > on other CPUs with an empty stock. > For the current CPU we can simply call drain_local_stock rather than > deferring it to the work queue. > > [KAMEZAWA Hiroyuki - use drain_local_stock for current CPU optimization] > Signed-off-by: Michal Hocko <mhocko@...e.cz> Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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