From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753247Ab0IEHx5 (ORCPT ); Sun, 5 Sep 2010 03:53:57 -0400 Received: from mondschein.lichtvoll.de ([194.150.191.11]:56209 "EHLO mail.lichtvoll.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751835Ab0IEHx4 (ORCPT ); Sun, 5 Sep 2010 03:53:56 -0400 From: Martin Steigerwald To: linux-kernel@vger.kernel.org Subject: Re: help with git bisecting a bug 16376: random - possibly Radeon DRM KMS related - freezes Date: Sun, 5 Sep 2010 09:53:41 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.33-tp42-01231-g11b897c; KDE/4.4.5; i686; ; ) Cc: Paolo Ornati , "Ted Ts'o" References: <201008312153.45792.Martin@lichtvoll.de> <20100901204716.775e9cfd@gmail.com> (sfid-20100901_212311_933866_A0CD9FCC) In-Reply-To: <20100901204716.775e9cfd@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart75513637.671KS0mUNc"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201009050953.52440.Martin@lichtvoll.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --nextPart75513637.671KS0mUNc Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Am Mittwoch 01 September 2010 schrieb Paolo Ornati: > On Tue, 31 Aug 2010 21:53:43 +0200 >=20 > Martin Steigerwald wrote: > > Obviously I am not interested in kernels prior 2.6.33. Should I just > > do a "git bisect good" without trying the kernel or is there some > > other remedy? >=20 > No. Git is right in asking you to test that commit: you are ignoring > branches and merges. [...] > So this this behaviour is normal :) So as to the advice of Ted in the thread "stable? quality assurance?" I am= =20 seeking some more help with bisecting this bug. I continued bisecting and=20 stumbled upon some problems: Quite some kernels were unbootable with an ext4 and readahead related=20 backtrace[1]. These were all within an USB merge and after skipping about=20 five unbootable kernels I skipped the whole range of commits in it. I=20 wondered by git insisted taking me back to this range of commits, even in=20 the middle of two skips, instead of automatically re-adjusting the binary=20 search, so that range would not be hit again for a while. Cause then its=20 would have not been hit at all eventually. Anyway, I think this problem=20 got fixed prior to 2.6.34 so I am asking whether there is a patch, a commit= =20 that fixed it in case I should stumble about such a unbootable kernel=20 again. I attached the backtrace screenshot to my bug comment[1]. Ted, I am= =20 not booting from USB, but from the internal harddrive. I think these=20 backtraces are completely unrelated to that USB commits. I think the bug=20 has been introduced before that USB merge and fixed somewhen afterwards,=20 but from a quick glance I didn't find the commit that fixes it. I am also seeking help with selecting more suitable commits to test: If=20 its a Radeon KMS related freeze and everything points at it, I think the=20 offending commit is in the first quarter of what git commit shows to me[2].= =20 Thus I'd like to select one commit before those drm/kms related commits=20 and one after it, before testing any other commits. But I have been fooled= =20 by those branches and merges before and there is the range of skipped=20 commits in that USB merge, thus I'd like advice on which commits to=20 select. A current git bisect log I attached to [2]. I will continue=20 bisecting as usual for the time being, but I really appreciate some help,=20 cause its still above 1800 commits to test otherwise and I am quite=20 annoyed by seeing the same roughly 11 steps even if the absolute number of= =20 commits got down by about somewhat: Bisecting: 1861 revisions left to test after this (roughly 11 steps) [1] https://bugzilla.kernel.org/show_bug.cgi?id=3D16376#c37 [2] https://bugzilla.kernel.org/show_bug.cgi?id=3D16376#c38 Thanks, =2D-=20 Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 --nextPart75513637.671KS0mUNc Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEABECAAYFAkyDTIYACgkQmRvqrKWZhMeuygCgsuviffbAtMoQwSNRJuaHWKIP /NgAn0wyBXBswLsqhkjWkN6noxI6yMLN =rrqj -----END PGP SIGNATURE----- --nextPart75513637.671KS0mUNc--