From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754013AbZELU1w (ORCPT ); Tue, 12 May 2009 16:27:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751191AbZELU1m (ORCPT ); Tue, 12 May 2009 16:27:42 -0400 Received: from smtp3.ultrahosting.com ([74.213.175.254]:45935 "EHLO smtp.ultrahosting.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750832AbZELU1l (ORCPT ); Tue, 12 May 2009 16:27:41 -0400 Date: Tue, 12 May 2009 16:26:50 -0400 (EDT) From: Christoph Lameter X-X-Sender: cl@qirst.com To: Rik van Riel cc: KOSAKI Motohiro , Wu Fengguang , Andrew Morton , "hannes@cmpxchg.org" , "peterz@infradead.org" , "linux-kernel@vger.kernel.org" , "tytso@mit.edu" , "linux-mm@kvack.org" , "elladan@eskimo.com" , "npiggin@suse.de" , "minchan.kim@gmail.com" Subject: Re: [PATCH -mm] vmscan: protect a fraction of file backed mapped pages from reclaim In-Reply-To: <4A09D957.2070908@redhat.com> Message-ID: References: <20090508125859.210a2a25.akpm@linux-foundation.org> <20090512025246.GC7518@localhost> <20090512120002.D616.A69D9226@jp.fujitsu.com> <4A09AC91.4060506@redhat.com> <4A09B46D.9010705@redhat.com> <4A09D957.2070908@redhat.com> User-Agent: Alpine 1.10 (DEB 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 12 May 2009, Rik van Riel wrote: > How many do you want before you're satisfied that this > benefits a significant number of workloads? One would be a good starter. > How many numbers do you want to feel safe that no workloads > suffer badly from this patch? > > Also, wow would you measure a concept as nebulous as desktop > interactivity? Measure the response to desktop clicks? I.e. retrieve an URL with a webbrowser that was running when the other load started. > Btw, the patch has gone into the Fedora kernel RPM to get > a good amount of user testing. I'll let you know what the > users say (if anything). I have not seen a single reference to a measurement taken with this patch. Maybe that is because I have not looked at the threads that discuss measurements with this patch. Where are they?