Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751152AbVI2ENZ (ORCPT ); Thu, 29 Sep 2005 00:13:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751155AbVI2ENZ (ORCPT ); Thu, 29 Sep 2005 00:13:25 -0400 Received: from sccrmhc13.comcast.net ([204.127.202.64]:18110 "EHLO sccrmhc13.comcast.net") by vger.kernel.org with ESMTP id S1751152AbVI2ENY (ORCPT ); Thu, 29 Sep 2005 00:13:24 -0400 From: kernel-stuff@comcast.net To: David.Ronis@mcgill.ca Cc: David Ronis , david.ronis@mcgill.ca, linux-kernel@vger.kernel.org Subject: RE: problem with 2.6.13.[0-2] Date: Thu, 29 Sep 2005 04:13:23 +0000 Message-Id: <092920050413.11090.433B69E3000AA6AE00002B5222058863609D0E050B9A9D0E99@comcast.net> X-Mailer: AT&T Message Center Version 1 (Dec 17 2004) X-Authenticated-Sender: d2FydWRrYXJAY29tY2FzdC5uZXQ= Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 913 Lines: 30 > > In 2.6.13.2: > > /dev/hda: > Timing cached reads: 28 MB in 2.15 seconds = 13.03 MB/sec > Timing buffered disk reads: 14 MB in 3.30 seconds = 4.24 MB/sec > > and after hdparm -m 16 /dev/hda (recall this is the default in 2.6.12.6) > > /dev/hda: > Timing cached reads: 24 MB in 2.05 seconds = 11.73 MB/sec > Timing buffered disk reads: 36 MB in 3.11 seconds = 11.56 MB/sec > > I ran thing a few times in each case and the results were close. There > was nothing in dmesg. > > David > Hey that 4.24 MB/sec hints at DMA being busted although it claims to be on. Can you post the complete dmesg output for both kernels please? Parag - 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/