Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.

• To: Alan Cox <[email protected]>
• Subject: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
• From: Paul Rolland <[email protected]>
• Date: Sat, 15 Dec 2007 08:08:31 +0000
• Cc: "H. Peter Anvin" <[email protected]>, Pavel Machek <[email protected]>, Ingo Molnar <[email protected]>, "David P. Reed" <[email protected]>, Thomas Gleixner <[email protected]>, [email protected], Ingo Molnar <[email protected]>, Rene Herman <[email protected]>, [email protected]
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• Sender: [email protected]

Hello,

On Fri, 14 Dec 2007 23:29:55 +0000
Alan Cox <[email protected]> wrote:

> On Fri, 14 Dec 2007 14:13:46 -0800
> "H. Peter Anvin" <[email protected]> wrote:
> 
> > Pavel Machek wrote:
> > > On Fri 2007-12-14 10:02:57, H. Peter Anvin wrote:
> > 
> > How long will that take to boot on a 386?
> 
> Well the dumb approach to fix that would seem to be to initialise it to
> 
> 	cpu->family   3 -> 50MHz 4 -> 300Mhz 5-> etc...

Just an idea : from what I've read, the problem (port 80 hanging) only occurs
on 'modern' machines... So why not :
 - use port 80 for old CPUs (PII, PIII) where it has never really been
   a problem,
 - use the cpu->family to do a best match for CPU freq
thus we could avoid increasing boot time too much...

Paul


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• Follow-Ups:
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Rene Herman <[email protected]>

• References:
  • [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "David P. Reed" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Pavel Machek <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Alan Cox <[email protected]>

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