Re: rc5 seemed to kill a disk that rc4-mm1 likes. Also some X trouble.

[Linus Torvalds]

On Mon, 5 Sep 2005, Sonny Rao wrote:
> 
> Can this method detect breakages that are spread across more than one
> patch? I suppose it'll just trigger on the last patch commited in the
> set in this case?   

It will trigger on just the commit that introduces the user-visible 
breakage, so yes, it's usually the last in a series (or the first one, for 
that matter).

And it's not perfect. A problem that fades in and out is not something you
can do binary searching on. For example, sometimes a bug gets introduced
and ends up being dependent on things like cache alignment or some
variable layout etc, so you only _see_ the problem occasionally, and it 
ends up happening due to totally unrelated changes - then the bisection 
algorithm ends up being totally useles..

		Linus
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