linux-kernel - Re: Linux 2.6.25-rc1

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Date:	Mon, 11 Feb 2008 07:16:27 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Brice Goglin <Brice.Goglin@...-lyon.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.25-rc1

On Mon, 11 Feb 2008 08:39:11 +0100
Brice Goglin <Brice.Goglin@...-lyon.org> wrote:

> Linus Torvalds wrote:
> >  - Lots of cleanups from the x86 merge (making more and more use of
> > common files), but also the big page attribute stuff is in and
> > caused a fair amount of churn, and while most of the issues should
> > have been very obvious and all got fixed, this is definitely one of
> > those things that we want a lot of very wide testing of to make
> > sure nothing regressed. 
> 
> Now that __ioremap isn't available anymore, is there anything in the
> new pageattr stuff to replace a manual __ioremap with __PAGE_PCD or

if you want uncached memory, use iorenmap_uncached...

> __PAGE_PSE? or do we have to wait for 2.6.26 to bring PAT support? I

__PAGE_PSE is the large page bit... that should be managed by the core for sure.
(yes I know that the same bit may have different meanings, but it's not __PAGE_PSE then).
PAT has a bunch of complications that really need to be resolved in the core
(eg how to deal with aliases etc etc)

> don't see any new function accepting random page attributes as
> __ioremap did.

correct

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