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From: "Alexander van Heukelum" <heukelum@fastmail.fm>
To: "Eric W. Biederman" <ebiederm@xmission.com>,
       "Vivek Goyal" <vgoyal@in.ibm.com>
Cc: "Alexander van Heukelum" <heukelum@mailshack.com>,
       "Steven Rostedt" <rostedt@goodmis.org>, "Andi Kleen" <ak@suse.de>,
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References: <Pine.LNX.4.58.0611082144410.17812@gandalf.stny.rr.com>
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   <200611101501.40007.ak@suse.de> <20061110154600.GA826@mailshack.com>
Subject: Re: [PATCH] shorten the x86_64 boot setup GDT to what the comment says
In-Reply-To: <20061110154600.GA826@mailshack.com>
Date: Sun, 12 Nov 2006 14:47:45 +0100
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On Fri, 10 Nov 2006 16:46:00 +0100, "Alexander van Heukelum"
<heukelum@mailshack.com> said:
> On Fri, Nov 10, 2006 at 03:01:39PM +0100, Andi Kleen wrote:
> > > Hi Andi,
> > > 
> > > (Assuming you mean: "The gdt table already is 16-byte aligned.")
> > > 
> > > Hmm. Not in the most recent version of Linus' tree, not even by
> > > concidence, and none of the patches in your quilt-current/patches touch
> > > x86_64's version of setup.S. Am I missing something?
> > 
> > The main GDT is. The boot GDT isn't, but it doesn't matter because
> > it is only used for a very short time.
> 
> Aha, thanks for clearing that up. I agree it is not important to have
> the boot GDT aligned, but I think it is preferable to make parts of the
> two versions of setup.S equal if possible.
> 
> Let's see what Steven Rostedt comes up with.
> 
> I find the relocatable image patches interesting. I wonder if one can
> get such a kernel 'running' using bochs, freedos, and loadlin ;).

Was it clear that I was sceptical about this still working? Oh well,
I tried it, and it did not break. Freedos' versions of himem and emm386 
loaded, DOS=HIGH,UMB.

Alexander
-- 
  Alexander van Heukelum
  heukelum@fastmail.fm

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