From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from d23relay03.au.ibm.com (d23relay03.au.ibm.com [202.81.18.234]) by e23smtp02.au.ibm.com (8.13.1/8.13.1) with ESMTP id l8HKmVdm030545 for ; Tue, 18 Sep 2007 06:48:31 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay03.au.ibm.com (8.13.8/8.13.8/NCO v8.5) with ESMTP id l8HKmG9u3858668 for ; Tue, 18 Sep 2007 06:48:16 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l8HKmFGs007938 for ; Tue, 18 Sep 2007 06:48:16 +1000 Message-ID: <46EEE80D.6060808@linux.vnet.ibm.com> Date: Tue, 18 Sep 2007 02:18:13 +0530 From: Balbir Singh Reply-To: balbir@linux.vnet.ibm.com MIME-Version: 1.0 Subject: Re: [PATCH] Configurable reclaim batch size References: <1189812002.5826.31.camel@lappy> <20070917215615.685a5378@lappy> In-Reply-To: <20070917215615.685a5378@lappy> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Peter Zijlstra Cc: Christoph Lameter , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Mel Gorman List-ID: Peter Zijlstra wrote: > On Mon, 17 Sep 2007 10:54:59 -0700 (PDT) Christoph Lameter > wrote: > >> On Sat, 15 Sep 2007, Peter Zijlstra wrote: >> >>> It increases the lock hold times though. Otoh it might work out with the >>> lock placement. >> Yeah may be good for NUMA. > > Might, I'd just like a _little_ justification for an extra tunable. > >>> Do you have any numbers that show this is worthwhile? >> Tried to run AIM7 but the improvements are in the noise. I need a tests >> that really does large memory allocation and stresses the LRU. I could >> code something up but then Lee's patch addresses some of the same issues. >> Is there any standard test that shows LRU handling regressions? > > hehe, I wish. I was just hoping you'd done this patch as a result of an > actual problem and not a hunch. Please do let me know if someone finds a good standard test for it or a way to stress reclaim. I've heard AIM7 come up often, but never been able to push it much. I should retry. -- Warm Regards, Balbir Singh Linux Technology Center IBM, ISTL -- 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