linux-kernel - Re: linux-next: origin tree build failure

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Message-ID: <20090612134940.GD32105@elte.hu>
Date:	Fri, 12 Jun 2009 15:49:40 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Linus <torvalds@...ux-foundation.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org,
	paulus@...ba.org, ppc-dev <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: linux-next: origin tree build failure


* Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:

> On Fri, 2009-06-12 at 23:10 +1000, Benjamin Herrenschmidt wrote:
> > On Fri, 2009-06-12 at 14:53 +0200, Ingo Molnar wrote:
> 
> > To some extent, here, the issue is on Linus side and it's up to him (Hey
> > Linus ! still listening ?) to maybe be more proactive at giving an ack
> > or nack so that we can get a chance to do that final pass of ironing out
> > the mechanical bugs before we hit the main tree.
> 
> Let me add a little bit more background to my reasoning here and why I
> think having this integration testing step is so valuable...
> 
> It all boils down to bisection and having a bisectable tree.

I think you are way too concentrated on this particular incident, 
and you are generalizing it into something that is not so in 
practice.

Even in this particular case, there's just 3 other commit points in 
the Git tree between commit 8a1ca8c (the breakage on PowerPC) and 
e14112d (the fix). We'll have up to 10,000 commits.

I bisect on an almost daily basis, and i'm not seeing unreasonable 
problems.

	Ingo
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