Comments on: Using git-bisect to find buggy kernel patches

By: Michael Plante

Michael Plante — Tue, 09 Mar 2010 03:00:00 +0000

Last year, I ran into a v4l problem, and, as my first experience with git, I tried bisecting, but I ran into problems (don’t remember what, but it was more of an issue between me and git, than between me and the kernel), and decided just to download a bunch of tarballs and narrow it down. I managed to narrow it down to a 4-number release, so I had figured I’d go back into git and try to narrow it down further, but apparently there are no tags for the 4-number versions, and the commit hash (from the release notes, apparently written by Greg KH) was unknown to git on a clone of Linus’ repo.

So I gave up and just rewrote the app to use v4l2 (which fixed my issue), but I’m nevertheless curious what I really should have done with the additional info I had about the 4-number release… obviously if it happened now, I wouldn’t even bother with the tarballs, but it’d be nice not to have to build another 10+ kernels above and beyond the minimum if I ever did decide to pick up where I left off…

By: My Domain

My Domain — Fri, 05 Feb 2010 01:23:15 +0000

Joe…

Check out my domain sometime….

By: Markos Chandras

Markos Chandras — Wed, 31 Dec 2008 10:29:46 +0000

Thank you for this great guide :)

By: Floroskop

Floroskop — Tue, 18 Mar 2008 09:45:49 +0000

Hello!
I think this try.

By: naisioxerloro

naisioxerloro — Wed, 28 Nov 2007 21:47:44 +0000

Hi.
Good design, who make it?

By: dsd

dsd — Sun, 25 Mar 2007 19:28:50 +0000

I’ve never used cogito. WIth git I would suggest you create a new branch (so that you do not lose the bisection state) and then hard reset to a tag.

# git branch mybranch
# git checkout mybranch
# git reset –hard v2.6.18-rc3

By: Toralf FÃƒÂ¶rster

Toralf FÃƒÂ¶rster — Wed, 07 Feb 2007 13:25:07 +0000

After bisecting I would try to compile a specific kernel version. How can I switch to a specific commit (with cogito I could do “$> cg-seek v2.6.18-rc3″) but the cogito scritps seems to be buggy, isn’t it ?

By: Pekka Enberg

Pekka Enberg — Sun, 19 Feb 2006 11:19:17 +0000

You are not doomed. The old bitkeeper repository has been converted to git and you can find it here: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/old-2.6-bkcvs.git/.

By: Chewi

Chewi — Wed, 08 Feb 2006 02:42:14 +0000

I started to use this approach to fix these infernal crashes I’ve been experiencing for nearly a year… and I came to the horrible realisation that it wasn’t going to work because the last good kernel was 2.6.9 – before git was created. I’m doomed! I really have tried everything. I’m not alone though, another guy with a similar Vaio has the same problem.

By: Benjamin

Benjamin — Sat, 28 Jan 2006 01:10:24 +0000

Now only if we could extend this and get git to use Newton’s method, which has *quadratic* convergence. Unfortunately the kernel isn’t a function, nor can we take it’s derivative.