linux-kernel - Re: [PATCH 2/3]i386: early init pgt for fix virtual addr in head.S

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Date:	Fri, 1 Jun 2007 12:46:50 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Andi Kleen" <ak@...e.de>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Greg KH" <gregkh@...e.de>, "Bjorn Helgaas" <bjorn.helgaas@...com>,
	"Vivek Goyal" <vgoyal@...ibm.com>,
	"linux kernel mailing list" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3]i386: early init pgt for fix virtual addr in head.S

On 6/1/07, Eric W. Biederman <ebiederm@...ssion.com> wrote:
> "Yinghai Lu" <yhlu.kernel@...il.com> writes:
>
> > early init pgt for fix virtual addr in head.S, so can use set_fixmap
> > before setup_arch.
> > otherwise set_fixmap_nocache will not work for i386
> >
> > Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> > Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>
>
> Hmm.  I'm wondering how my signed off by got on this one.
> Maybe I did this at some point.
>
> In any case this patch looks wrong (unless I'm completely mistaken)
> because it doesn't appear to handle PAE mode.
>
> Which is why I initialized the early page table in C, in my
> last round of patches on this subject.
>
> If we don't know the page table format doing this kind of
> thing is very difficult.

it is from post for your usb debug port patch. so you have updated one for i386?
and x86_64 is right?

YH
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