From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grozdan Subject: Re: Kernel 2.6.30rc7 limits IDE to UDMA33 Date: Sun, 7 Jun 2009 20:24:11 +0200 Message-ID: References: <20090605100505.41b3b818@lxorguk.ukuu.org.uk> <20090605114245.175499e1@lxorguk.ukuu.org.uk> <4A29C163.3080706@gmail.com> <20090606155636.18bc4f2e@lxorguk.ukuu.org.uk> <4A2AB298.7020603@gmail.com> <4A2BF785.3020402@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from mail-ew0-f210.google.com ([209.85.219.210]:35950 "EHLO mail-ew0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753290AbZFGSYK (ORCPT ); Sun, 7 Jun 2009 14:24:10 -0400 In-Reply-To: <4A2BF785.3020402@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Robert Hancock Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, tj@kernel.org, alan@lxorguk.ukuu.org.uk 2009/6/7 Robert Hancock : > Grozdan wrote: >> >> 2009/6/6 Robert Hancock : >>> >>> Thing is somehow the GTM detection isn't working now and it apparently >>> was >>> in 2.6.27.1. I'm not seeing any patches to pata_via or libata-acpi that >>> seem >>> like they would affect this offhand. Grozdan, would you be able to try >>> git >>> bisect to try to figure out what changed the behavior? >>> >>> CCing Tejun in case he has any ideas.. >>> >> >> I've no idea how and where to do a git bisect so if someone is willing >> to explain in simple steps, I can try... > > Linus's post on here is a pretty simple explanation: > > http://kerneltrap.org/node/11753 > Yes, it's clear to someone who's familiar with git but not to a noob like me. Where do I run this git? After it's finished what to do next? How many times do I have to compile kernels? Which kernels exactly? After booting a "bad" kernel, what then? etc... From reading the article, the guy has to compile 14!! times just to catch a problem between kernel 2.6.21 and 2.6.22. I guess in my case I'll have to compile a lot more than 14 times to catch something between kernel 2.6.27 and 2.6.30 and honestly I don't have time for this right now. However, I did a diff between the pata_via driver of kernel 2.6.27 and 2.6.30 and there have been changes to it but I'm not sure if they affect the cable detection...