linux-kernel - Re: Linux 2.6.24

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Date:	Fri, 25 Jan 2008 12:58:08 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Valdis.Kletnieks@...edu
Cc:	"Giacomo A. Catenazzi" <cate@...eee.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.24

On Friday, 25 of January 2008, Valdis.Kletnieks@...edu wrote:
> On Fri, 25 Jan 2008 10:10:11 +0100, "Giacomo A. Catenazzi" said:
> 
> > As a tester I would like:
> > - slow merges, so that developer could rebase and test
> >    (compile test) the interaction of the new code.
> 
> An amazing amount of stuff gets caught when it's tested in Andrew Morton's -mm
> tree.  You think -rc1's are bad now, consider that much of what will be
> 25-rc1 already got tried as 24-rc6-mm1 and 24-rc8-mm1.  Without those, the
> -rc1 releases would be truly horrific.. ;)
> 
> > - you will introduce a new step on git management:
> >    Every changeset is compile-tested before going out to the world.
> >    I think this can be done automatically, and I think that one or
> >    two configurations are enough to find most of the problems.
> 
> It's true that a compile on x86 and a compile on PowerPC

Please add IA-64 and ARM at the very least.

> should flush out 
> most of the truly stupid mistakes, but those are usually found and fixed
> literally within hours.  Anyhow, the proper time for test compiles is *before*
> it goes into the git trees at all - it should have been tested before it
> gets sent to a maintainer for inclusion.

That's correct, but I'm not sure how to enforce it.

> Plus, there's a *lot* of issues that "one or two configurations" won't
> find - we continually find build issues that literally depend on 3 or 4
> different CONFIG_* settings, and only misbehave for one specific combination.
> And all the things that compile clean but explode at runtime.

Absolutely.

I whish there would be more time for testing things during merge windows.

Greetings,
Rafael
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