linux-kernel - Re: CPA boot crash (was: [PATCH] [0/36] Great change_page

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Date:	Fri, 18 Jan 2008 17:21:18 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	jbeulich@...ell.com, venkatesh.pallipadi@...el.com
Subject: Re: CPA boot crash (was: [PATCH] [0/36] Great change_page_attr
	patch series v3)


* Andi Kleen <ak@...e.de> wrote:

> > > (except for the white space changes, but that can be redone once 
> > > everything settled down again). Then it will be bisectable.
> > 
> > it's a revert barrier (within v2.6.25),
> 
> What is a revert barrier?
>
> Anyways of course the way to handle that is the same as with the other 
> undo patches: drop the original white space changes 
> (ddb53b5735793a19dc17bcd98b050f672f) completely and then drop that 
> undo patch too. The white space changes haven't reached Linus yet so 
> you can just make them disappear completely from known history.

we dont want them to disappear, due to the second half of:

   http://lkml.org/lkml/2008/1/18/112

we want easy-cleanups first, difficult changes applied second. It's a 
well-established concept.

	Ingo
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