linux-kernel - Re: AAARGH bisection is hard (Re: [2.6.39 regression] X locks up hard right after logging in)

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Message-ID: <4DCD79A0.7000500@kdbg.org>
Date:	Fri, 13 May 2011 20:34:08 +0200
From:	Johannes Sixt <j6t@...g.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Andrew Lutomirski <luto@....edu>,
	Christian Couder <christian.couder@...il.com>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	git@...r.kernel.org, Shuang He <shuang.he@...el.com>
Subject: Re: AAARGH bisection is hard (Re: [2.6.39 regression] X locks up
 hard right after logging in)

Am 13.05.2011 19:54, schrieb Linus Torvalds:
> For example, in your case, since you had certain requirements of
> support that simply didn't exist earlier, something like
> 
>    git bisect requires v2.6.38
> 
> would have been really useful - telling git bisect that any commit
> that cannot reach that required commit is not even worth testing.

You can already have this with

   git bisect good v2.6.38

It sounds a bit unintuitive, but with a slight mind-twist it can even be
regarded as correct in a mathematical sense: when the precondition is
false, the result is true. ;-)

-- Hannes
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