Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755013AbXEJDsW (ORCPT ); Wed, 9 May 2007 23:48:22 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754424AbXEJDsO (ORCPT ); Wed, 9 May 2007 23:48:14 -0400 Received: from py-out-1112.google.com ([64.233.166.177]:52256 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754381AbXEJDsN (ORCPT ); Wed, 9 May 2007 23:48:13 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=BxS0Vz8qmraZ7bZ4Faunb7N+sYmIpndw1FX58GbLEd35lUGvXl33DF+G5EJ9G282PM5WeOJUVWRIvr18grNq9P1FZSuACP0gT9QSaJ2gwQ4FFsx4JLH7VZedAYFes6V672uRbCzPULEK//ofsvzx6EvrHRVUdq5lFxpIdnRjShI= Message-ID: <2c0942db0705092048m38b36e7fo3a7c2c59fe1612b2@mail.gmail.com> Date: Wed, 9 May 2007 20:48:11 -0700 From: "Ray Lee" To: "Nick Piggin" Subject: Re: swap-prefetch: 2.6.22 -mm merge plans Cc: "Con Kolivas" , "Ingo Molnar" , "ck list" , "Andrew Morton" , linux-kernel@vger.kernel.org, linux-mm@kvack.org In-Reply-To: <46427BDB.30004@yahoo.com.au> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20070430162007.ad46e153.akpm@linux-foundation.org> <200705100928.34056.kernel@kolivas.org> <464261B5.6030809@yahoo.com.au> <200705101134.34350.kernel@kolivas.org> <46427BDB.30004@yahoo.com.au> X-Google-Sender-Auth: dbc17ee54f6315dc Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1406 Lines: 28 On 5/9/07, Nick Piggin wrote: > You said it helped with the updatedb problem. That says we should look at > why it is going bad first, and for example improve use-once algorithms. > After we do that, then swap prefetching might still help, which is fine. Nick, if you're volunteering to do that analysis, then great. If not, then you're just providing a airy hope with nothing to back up when or if that work would ever occur. Further, if you or someone else *does* do that work, then guess what, we still have the option to rip out the swap prefetching code after the hypothetical use-once improvements have been proven and merged. Which, by the way, I've watched people talk about since 2.4. That was, y'know, a *while* ago. So enough with the stop energy, okay? You're better than that. Con? He is right about the last feature to go in needs to work gracefully with what's there now. However, it's not unheard of for authors of other sections of code to help out with incompatibilities by answering politely phrased questions for guidance. Though the intersection of users between cpusets and desktop systems seems small indeed. - 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/