From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755118Ab0IASOH (ORCPT ); Wed, 1 Sep 2010 14:14:07 -0400 Received: from mtaout03-winn.ispmail.ntl.com ([81.103.221.49]:6788 "EHLO mtaout03-winn.ispmail.ntl.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752714Ab0IASOG convert rfc822-to-8bit (ORCPT ); Wed, 1 Sep 2010 14:14:06 -0400 Date: Wed, 1 Sep 2010 19:13:41 +0100 From: Ken Moffat To: Martin Steigerwald Cc: linux-kernel@vger.kernel.org Subject: Re: help with git bisecting a bug 16376: random - possibly Radeon DRM KMS related - freezes Message-ID: <20100901181341.GA11861@deepthought> References: <201008312153.45792.Martin@lichtvoll.de> <20100831223921.GA23476@deepthought> <201009011810.31642.Martin@lichtvoll.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <201009011810.31642.Martin@lichtvoll.de> User-Agent: Mutt/1.5.12-2006-07-14 Content-Transfer-Encoding: 8BIT X-Cloudmark-Analysis: v=1.1 cv=3ENABmdyEd/Fm7fR7+mZIuMDn6+IErAeEhlfWBImZFk= c=1 sm=0 a=zzU6Ef89lnMA:10 a=8nJEP1OIZ-IA:10 a=JFx7__YRT1V1ggT0OZ0A:9 a=2EPQNfS7Pjj9lnByI4y0Y5W1A2MA:4 a=wPNLvfGTeEIA:10 a=HpAAvcLHHh0Zw7uRqdWCyQ==:117 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 01, 2010 at 06:10:24PM +0200, Martin Steigerwald wrote: > Am Mittwoch 01 September 2010 schrieb Ken Moffat: > > > > While you are bisecting, don't believe the version in Makefile. I > > got similarly freaked out a couple of years ago - if I understood > > correctly, it's something to do with when a change was created. > > > > The key point is that during bisection the apparent version *can* > > go back to a version that appears to be before the initial "good" > > kernel. > > I verified the version by running git log after doing the skip. And it was > just 300 lines after Linus commited 2.6.33-rc2. Can git log be showing > incorrect results during a bisect? > > Thanks, I suggest you go with the versions that git bisect selects. I appreciate that it takes you a long time to build and test each kernel, but hopefully you can reach a stage where the bad commit is identified. I think I've seen people report that an old commit was identified as causing a problem, and I also think that in those cases the problem was exposed by a later commit. ken -- das eine Mal als Tragödie, das andere Mal als Farce