Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965290AbXAJXEj (ORCPT ); Wed, 10 Jan 2007 18:04:39 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965294AbXAJXEj (ORCPT ); Wed, 10 Jan 2007 18:04:39 -0500 Received: from omx2-ext.sgi.com ([192.48.171.19]:36528 "EHLO omx2.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965290AbXAJXEi (ORCPT ); Wed, 10 Jan 2007 18:04:38 -0500 Date: Wed, 10 Jan 2007 15:04:15 -0800 (PST) From: Christoph Lameter To: David Chinner cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [REGRESSION] 2.6.19/2.6.20-rc3 buffered write slowdown In-Reply-To: <20070110223731.GC44411608@melbourne.sgi.com> Message-ID: References: <20070110223731.GC44411608@melbourne.sgi.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 594 Lines: 13 On Thu, 11 Jan 2007, David Chinner wrote: > The performance and smoothness is fully restored on 2.6.20-rc3 > by setting dirty_ratio down to 10 (from the default 40), so > something in the VM is not working as well as it used to.... dirty_background_ratio is left as is at 10? So you gain performance by switching off background writes via pdflush? - 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/