From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail7.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id m936mUbb009820 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Fri, 3 Oct 2008 15:48:30 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 2665E1B801F for ; Fri, 3 Oct 2008 15:48:30 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id DD2772DC01E for ; Fri, 3 Oct 2008 15:48:29 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id B95F21DB803A for ; Fri, 3 Oct 2008 15:48:29 +0900 (JST) Received: from ml12.s.css.fujitsu.com (ml12.s.css.fujitsu.com [10.249.87.102]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 6A0801DB803E for ; Fri, 3 Oct 2008 15:48:29 +0900 (JST) From: KOSAKI Motohiro Subject: Re: [PATCH 0/4] Reclaim page capture v4 In-Reply-To: <28c262360810011946p443350d3hcb271720892e7b85@mail.gmail.com> References: <1222864261-22570-1-git-send-email-apw@shadowen.org> <28c262360810011946p443350d3hcb271720892e7b85@mail.gmail.com> Message-Id: <20081003154616.EF74.KOSAKI.MOTOHIRO@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Fri, 3 Oct 2008 15:48:28 +0900 (JST) Sender: owner-linux-mm@kvack.org Return-Path: To: MinChan Kim Cc: kosaki.motohiro@jp.fujitsu.com, Andy Whitcroft , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Peter Zijlstra , Christoph Lameter , Rik van Riel , Mel Gorman , Nick Piggin , Andrew Morton List-ID: > Hi, Andy. > > I tested your patch in my desktop. > The test is just kernel compile with single thread. > My system environment is as follows. > > model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz > MemTotal: 2065856 kB > > When I tested vanilla, compile time is as follows. > > 2433.53user 187.96system 42:05.99elapsed 103%CPU (0avgtext+0avgdata > 0maxresident)k > 588752inputs+4503408outputs (127major+55456246minor)pagefaults 0swaps > > When I tested your patch, as follows. > > 2489.63user 202.41system 44:47.71elapsed 100%CPU (0avgtext+0avgdata > 0maxresident)k > 538608inputs+4503928outputs (130major+55531561minor)pagefaults 0swaps > > Regresstion almost is above 2 minutes. > Do you think It is a trivial? Ooops. this is definitly significant regression. > I know your patch is good to allocate hugepage. > But, I think many users don't need it, including embedded system and > desktop users yet. > > So I suggest you made it enable optionally. No. if the patch has this significant regression, nobody turn on its option. We should fix that. -- 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