Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754649AbYFYHhk (ORCPT ); Wed, 25 Jun 2008 03:37:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752639AbYFYHha (ORCPT ); Wed, 25 Jun 2008 03:37:30 -0400 Received: from rv-out-0506.google.com ([209.85.198.238]:16114 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751859AbYFYHh3 (ORCPT ); Wed, 25 Jun 2008 03:37:29 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=uMoY1rOhU1tImVW3H8gFu3Fg481pxqZS5+e7uNNswIkwzjN/AVM14VTshwEke8yN2X IBh0L8UlJu3yygNXjYD1GPGtrVFs/7yf1TkUAMoBLAYVY7mVhGTtdqT0WPohTYLmfuX/ SM9j4az58o1/hFy+w0oBuTRVZTHYmPwGezwt8= Message-ID: <28c262360806250037k9fcde73g9b28c26eb8523f04@mail.gmail.com> Date: Wed, 25 Jun 2008 16:37:29 +0900 From: "MinChan Kim" To: "KOSAKI Motohiro" Subject: Re: [RFC][PATCH] prevent incorrect oom under split_lru Cc: "Rik van Riel" , linux-mm , LKML , "Lee Schermerhorn" , akpm@linux-foundation.org, "Takenori Nagano" 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: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1357 Lines: 43 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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/