Re: CPA boot crash (was: [PATCH] [0/36] Great change_page_attrpatch series v3)

From: Ingo Molnar
Date: Fri Jan 18 2008 - 11:21:53 EST



* Andi Kleen <ak@xxxxxxx> 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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