linux-kernel - Re: Linux 2.6.22 released

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Message-ID: <20070711224322.GC25510@one.firstfloor.org>
Date:	Thu, 12 Jul 2007 00:43:22 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Martin Orr <martin@...tinorr.name>,
	Stefano Rivoir <s.rivoir@....it>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.22 released

On Wed, Jul 11, 2007 at 03:37:41PM -0700, Linus Torvalds wrote:
> 
> 
> On Thu, 12 Jul 2007, Andi Kleen wrote:
> >
> > I just checked with today's gcc 4.2 (070711) freshly compiled and from a quick inspection 
> > the code looks correct again. So perhaps it has been already fixed? 
> 
> Did you see the breakage with the original compiler? It might be some 

No, i don't have a debian compiler and i normally use gcc 4.1 on my
workstation.

BTW I just heard that at least one package in suse STABLE (using a slightly 
older gcc 4.2 snapshot) apprently with inline assembly got miscompiled too

> config setup or something.
> 
> But yeah, if Debian/sid is just using random compiler snapshots of the 
> day, I htink we can just bury this as "pointless".
> 
> Who the heck takes a compiler snapshot and runs with it? At least when 
> your kernel breaks, it seldom breaks subtly (but I would expect that most 
> distros would not pick random nightly kernel builds). When your compiler 
> breaks, you have random problems in totally unexpected places, the last 
> thing you want to have is a random nightly snapshot in a distro - even a 
> development one.

I guess it's because gcc 4.2 is technically supposed to be a -stable tree.

Also recompiling whole distros tends to find a lot of compiler bugs so
I guess it's useful QA for them.

-Andi
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