From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [git patches] libata ACPI support Date: Tue, 20 Feb 2007 18:49:17 -0500 Message-ID: <45DB88FD.5020509@garzik.org> References: <20070220214716.GA3690@mail.muni.cz> <45DB74D9.206@garzik.org> <20070220232633.GA3598@mail.muni.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-2; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:48963 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161091AbXBTXtT (ORCPT ); Tue, 20 Feb 2007 18:49:19 -0500 In-Reply-To: <20070220232633.GA3598@mail.muni.cz> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Lukas Hejtmanek Cc: linux-kernel@vger.kernel.org, IDE/ATA development list Lukas Hejtmanek wrote: > On Tue, Feb 20, 2007 at 05:23:21PM -0500, Jeff Garzik wrote: >>> introducing SATA ACPI does not work for me (I've filled the bug >>> report: http://bugzilla.kernel.org/show_bug.cgi?id=8046) beside those error >>> messages, IDE performance is decreased. libata.noacpi=1 option works ok but >>> the performance is still slightly degraded (about 10%). >> Does performance come back if you also use acpi=off ? > > It does not. > > With 2.6.20-git15, hdparm -t /dev/sda says 28MB/s, > with 2.6.20, hdparm -t /dev/sda says 32MB/s. Can you narrow down the -gitX release further? i.e. does 2.6.20-git13 perform at full speed? -git13 includes several libata changes, but does not include the ACPI additions. Since this is an ACPI execution error in the bug, that would tend to point to bad BIOS tables. But since there is a performance drop that does not disappear with acpi=off, there might also be another factor, unrelated to ACPI, at play here. Jeff