linux-kernel - Re: [PATCH] x86: Construct 32 bit boot time page tables in native format.

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Date:	Tue, 22 Jan 2008 22:21:44 +0000
From:	Ian Campbell <ijc@...lion.org.uk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Mika Penttilä <mika.penttila@...umbus.fi>,
	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>
Subject: Re: [PATCH] x86: Construct 32 bit boot time page tables in native
	format.


On Tue, 2008-01-22 at 13:00 -0800, H. Peter Anvin wrote:
> Ian Campbell wrote:
> > On Tue, 2008-01-22 at 21:36 +0100, Ingo Molnar wrote:
> >> * H. Peter Anvin <hpa@...or.com> wrote:
> >>
> >>>> Seems reasonable to me. I'll integrate your asm diff with the other 
> >>>> changes and give it a whirl.
> >>> This version boots into userspace on both PAE and !PAE.  You want to 
> >>> take it from here?
> >> ok, i'll wait for Ian to submit the final (tested) version then. A few 
> >> possible complications are: PSE-less boxes, 32-bit PAGEALLOC bootups 
> >> with tons of RAM, NX-less boxes and NX-able boxes :)
> > 
> > I'm not sure I can promise that sort of coverage ;-) Will test on what
> > hardware I've got available...
> > 
> 
> I tend to use simulators (e.g. Qemu) quite a bit.  They let you tune 
> this kind of stuff.

So do I but I'd never really investigated the option to fiddle with the
CPU type -- very useful though, thanks for the tip!

Ian.

-- 
Ian Campbell

No one can feel as helpless as the owner of a sick goldfish.

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