From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by rv-out-0708.google.com with SMTP id f25so11232541rvb.26 for ; Wed, 25 Jun 2008 00:37:29 -0700 (PDT) Message-ID: <28c262360806250037k9fcde73g9b28c26eb8523f04@mail.gmail.com> Date: Wed, 25 Jun 2008 16:37:29 +0900 From: "MinChan Kim" Subject: Re: [RFC][PATCH] prevent incorrect oom under split_lru In-Reply-To: <20080625161753.D848.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <28c262360806242356n3f7e02abwfee1f6acf0fd2c61@mail.gmail.com> <28c262360806242358q348e18a4vb9c48b4b853b0384@mail.gmail.com> <20080625161753.D848.KOSAKI.MOTOHIRO@jp.fujitsu.com> Sender: owner-linux-mm@kvack.org Return-Path: To: KOSAKI Motohiro Cc: Rik van Riel , linux-mm , LKML , Lee Schermerhorn , akpm@linux-foundation.org, Takenori Nagano List-ID: On Wed, Jun 25, 2008 at 4:29 PM, KOSAKI Motohiro wrote: >> > But if such emergency happen in embedded system, application can't be >> > executed for some time. >> > I am not sure how long time it take. >> > But In some application, schedule period is very important than memory >> > reclaim latency. >> > >> > Now, In your patch, when such emergency happen, it continue to reclaim >> > page until it will scan entire page of lru list. >> > It >> >> with my mistake, I omit following message. :( >> >> So, we need cut-off mechanism to reduce application latency. >> So In my opinion, If we modify some code of Takenori's patch, we can >> apply his idea to prevent latency probelm. > > Yup. > Agreed with latency is as important as throughput. > > if anyone explain that patch have reduce some latency and > no throughput degression by benchmark result, > I have no objection, Of cource. > > Can you post any performance result? > > hm.. I am not sure when I can post result of benchmark. Of course, If I do, I will post it :) Thanks, Kosaki-san -- Kinds regards, MinChan Kim -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org