linux-kernel - Re: [PATCH -mm 1/3] i386 boot: replace boot_ioremap with enhanced bt_ioremap

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Date:	Fri, 18 Jan 2008 17:45:46 +0000
From:	Ian Campbell <ijc@...lion.org.uk>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	huang ying <huang.ying.caritas@...il.com>,
	"Huang, Ying" <ying.huang@...el.com>, akpm@...ux-foundation.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Andi Kleen <ak@...e.de>,
	linux-kernel@...r.kernel.org, Stephen Tweedie <sct@...hat.com>
Subject: Re: [PATCH -mm 1/3] i386 boot: replace boot_ioremap with enhanced
	bt_ioremap - enhance bt_ioremap


On Fri, 2008-01-18 at 09:27 -0800, Jeremy Fitzhardinge wrote:
> Ingo Molnar wrote:
> > * Ian Campbell <ijc@...lion.org.uk> wrote:
> >
> >   
> >>> Eric Biederman had a patchset that makes a PAE kernel use PAE page 
> >>> tables from the start.  That is really The Right Thing[TM].
> >>>       
> >> That's much saner than dup'ing up the early ioremap stuff to support 
> >> both PAE and non-PAE at runtime, which is about the only idea I've got 
> >> for fixing this right now...
> >>
> >> I think I'll just back out the early_ioremap patches locally for now 
> >> and wait for Eric's patches which should cause the fix for this issue 
> >> to just fall out in the wash.
> >>     
> >
> > Eric's patchset is nowhere near being submitted - he _had_ a patchset. 
> > So this needs to be fixed by the Xen-guest folks. (if the easiest/best 
> > fix is to pick up Eric's patchset, then plese do it so)
> >   
> 
> This is only relevent to dom0 isn't it?  sct is looking at that at the 
> moment.  

The early_ioremap stuff gets called on domU too, for example
get_bios_ebda(). Or was the intention that these should be gated at a
higher level?

Ian.
-- 
Ian Campbell

Pie are not square.  Pie are round.  Cornbread are square.

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