Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754512AbYJCRWD (ORCPT ); Fri, 3 Oct 2008 13:22:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753195AbYJCRVk (ORCPT ); Fri, 3 Oct 2008 13:21:40 -0400 Received: from casper.infradead.org ([85.118.1.10]:44995 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752871AbYJCRVi (ORCPT ); Fri, 3 Oct 2008 13:21:38 -0400 Date: Fri, 3 Oct 2008 10:21:17 -0700 From: Arjan van de Ven To: Andrew Morton Cc: Jens Axboe , linux-kernel@vger.kernel.org, Alan Cox Subject: Re: [PATCH] Give kjournald a IOPRIO_CLASS_RT io priority Message-ID: <20081003102117.7db22b09@infradead.org> In-Reply-To: <20081002222438.8f9f90a2.akpm@linux-foundation.org> References: <20081001200034.65eb67d6@infradead.org> <20081001215638.3a65134c.akpm@linux-foundation.org> <20081002062736.GR19428@kernel.dk> <20081001235501.2b7f50fe.akpm@linux-foundation.org> <20081002061236.3c71c877@infradead.org> <20081002132457.46ad8d05.akpm@linux-foundation.org> <20081002210117.0f5062f7@infradead.org> <20081002212355.621a4fb6@infradead.org> <20081002214000.89420bb3.akpm@linux-foundation.org> <20081002214353.30873f98@infradead.org> <20081002215026.a63ba0d0.akpm@linux-foundation.org> <20081002220040.7963596c@infradead.org> <20081002222438.8f9f90a2.akpm@linux-foundation.org> Organization: Intel X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.12; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 923 Lines: 23 On Thu, 2 Oct 2008 22:24:38 -0700 Andrew Morton wrote: > > Mount a junk partition with `-oakpm' and run some benchmarks. If the > results are "wow" then it's worth spending time on. If the results > are "meh" then we can not bother.. > I've been running with this for a few hours now while I can't see IO is perfectly smooth now, it does feel a lot better and latencytop isn't showing me the huge spikes in latency either in the mail client. (there's a lot of little stuff, but not the 4+ seconds) -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- 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/