From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Michal Hocko <mhocko@suse.cz>,
linux-mm@kvack.org, Balbir Singh <bsingharora@gmail.com>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] memcg: prevent from reclaiming if there are per-cpu cached charges
Date: Fri, 22 Jul 2011 09:18:58 +0900 [thread overview]
Message-ID: <20110722091858.f4b78e14.kamezawa.hiroyu@jp.fujitsu.com> (raw)
In-Reply-To: <20110722085652.759aded2.kamezawa.hiroyu@jp.fujitsu.com>
On Fri, 22 Jul 2011 08:56:52 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:
> On Thu, 21 Jul 2011 14:30:12 +0200
> Michal Hocko <mhocko@suse.cz> wrote:
> Please wait until "background reclaim" stuff. I don't stop it and it will
> make this cpu-caching stuff better because we can drain before hitting
> limit.
>
> If you cannot wait....
>
> One idea is to have a threshold to call async "drain". For example,
>
> threshould = limit_of_memory - nr_online_cpu() * (BATCH_SIZE + 1)
>
> if (usage > threshould)
> drain_all_stock_async().
>
> Then, situation will be much better.
>
Of course, frequency of this call can be controlled by event counter.
Thanks,
-Kame
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next prev parent reply other threads:[~2011-07-22 0:26 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-21 9:41 [PATCH 0/4] memcg: cleanup per-cpu charge caches + fix unnecessary reclaim if there are still " Michal Hocko
2011-07-21 7:38 ` [PATCH 1/4] memcg: do not try to drain per-cpu caches without pages Michal Hocko
2011-07-21 10:12 ` KAMEZAWA Hiroyuki
2011-07-21 11:36 ` Michal Hocko
2011-07-21 23:44 ` KAMEZAWA Hiroyuki
2011-07-22 9:19 ` Michal Hocko
2011-07-22 9:28 ` KAMEZAWA Hiroyuki
2011-07-22 9:58 ` Michal Hocko
2011-07-22 10:23 ` Michal Hocko
2011-07-21 7:50 ` [PATCH 2/4] memcg: unify sync and async per-cpu charge cache draining Michal Hocko
2011-07-21 10:25 ` KAMEZAWA Hiroyuki
2011-07-21 11:36 ` Michal Hocko
2011-07-21 7:58 ` [PATCH 3/4] memcg: get rid of percpu_charge_mutex lock Michal Hocko
2011-07-21 10:30 ` KAMEZAWA Hiroyuki
2011-07-21 11:47 ` Michal Hocko
2011-07-21 12:42 ` Michal Hocko
2011-07-21 23:49 ` KAMEZAWA Hiroyuki
2011-07-22 9:21 ` Michal Hocko
2011-07-22 0:27 ` Daisuke Nishimura
2011-07-22 9:41 ` Michal Hocko
2011-07-21 8:28 ` [PATCH 4/4] memcg: prevent from reclaiming if there are per-cpu cached charges Michal Hocko
2011-07-21 10:54 ` KAMEZAWA Hiroyuki
2011-07-21 12:30 ` Michal Hocko
2011-07-21 23:56 ` KAMEZAWA Hiroyuki
2011-07-22 0:18 ` KAMEZAWA Hiroyuki [this message]
2011-07-22 9:54 ` Michal Hocko
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