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Date: Wed, 27 Nov 1996 21:25:45 +1100 (EST)
From: Andrew MacIntyre <andymac@bullseye.apana.org.au>
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To: Terje Normann Marthinussen <Terje.N.Marthinussen@cc.uit.no>
cc: freebsd-smp@freebsd.org, Steve Passe <smp@csn.net>
Subject: Re: cvs commit: sys/i386/i386 locore.s swtch.s sys/i386/include pmap.h 
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More info: - just stumbled across some followups to the original msg 
referred to below.

Apparently the problem has to do with using the 4MB page extension 
supported by P5 and better CPUs.

Andrew I MacIntyre                     "These thoughts are mine alone..."
E-mail: andrew.macintyre@aba.gov.au    (work) | Snail: PO Box 370
        andymac@bullseye.apana.org.au  (play) |        Belconnen  ACT  2616
Fido:   Andrew MacIntyre, 3:620/243.18        |        Australia

On Wed, 27 Nov 1996, Andrew MacIntyre wrote:

> On Wed, 27 Nov 1996, Terje Normann Marthinussen wrote:
> 
> {...}
> 
> > Processors:	APIC ID	Version	State		Family	Model	Step	Flags
> > 		 0	 0x10	 BSP, usable	 5	 2	 11	 0x03bf
> > 		 2	 0x10	 AP, usable	 5	 2	 11	 0x03bf
> > 		 3	 0x10	 AP, usable	 5	 2	 5	 0x03bf
> > 		 4	 0x10	 AP, usable	 5	 2	 5	 0x03bf
> 
>                                                                 ^^^^
> 
> {...}
> 
> Just FYI, I recall seeing a message recently from Linus Torvalds (in a Linux 
> newsgroup) indicating that there was evidence that Stepping 5 (and possibly 
> earlier) P5 CPUs had a problem that affected operation of the Linux 
> kernel.  Unfortunately I don't recall the substance of this message :-(.
> 
> 
> Andrew I MacIntyre                     "These thoughts are mine alone..."
> E-mail: andrew.macintyre@aba.gov.au    (work) | Snail: PO Box 370
>         andymac@bullseye.apana.org.au  (play) |        Belconnen  ACT  2616
> Fido:   Andrew MacIntyre, 3:620/243.18        |        Australia
>