linux-kernel - Re: 3.0-rc1: powerpc hangs at Kernel virtual memory layout

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Date:	Wed, 01 Jun 2011 13:49:03 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Christian Kujau <lists@...dbynature.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux ppc dev <linuxppc-dev@...ts.ozlabs.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: 3.0-rc1: powerpc hangs at Kernel virtual memory layout

On Tue, 2011-05-31 at 20:02 -0700, Christian Kujau wrote:
> (Cc'in Linus)
> 
> On Tue, 31 May 2011 at 17:48, Christian Kujau wrote:
> > In the meantime, "git bisect" behaves kinda weird, I don't know what went 
> > wrong here:
> > 
> >  $ git bisect start
> >  $ git bisect good         # Linux 2.6.39
> >  $ git bisect bad v3.0-rc1 # Linux 3.0-rc1
> >  $ git bisect bad          # c44dead70a...
> >  $ git bisect bad          # d93515611b..
> > 
> > ...yet the ./Makefile shows[0] that I'm already way behind: 2.6.39-rc2. 
> > Maybe "git bisect" got confused with that whole 2.6.x -> 3.0 renaming?
> 
> Hm, I tried again, from a clean v3.0-rc1 (git reset --hard), but after the 
> 2nd "git bad" I'm at 2.6.39-rc2 again - while I /should/ be somwhere 
> inbetween v2.6.39..v3.0-rc1, right?

Kernel version is totally irrelevant when bisecting. You are not walking
through a linear series of patches but a complex tree of merges which
might have forked off different versions in the first place.

Cheers,
Ben.


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