From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dave Jones <davej@suse.de>
Subject: Re: Kernel Load Warnings
Date: Tue, 19 Nov 2002 15:19:26 +0100
Sender: linux-smp-owner@vger.kernel.org
Message-ID: <20021119151926.B26663@suse.de>
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In-Reply-To: <001201c28fd4$a5597fe0$0200000a@parseerror.dk>; from mb@ncparty.dk on Tue, Nov 19, 2002 at 03:04:52PM +0100
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To: =?iso-8859-1?Q?Matias_Bj=F8rling?= <mb@ncparty.dk>
Cc: linux-smp@vger.kernel.org

On Tue, Nov 19, 2002 at 03:04:52PM +0100, Matias Bj=F8rling wrote:
 > ACPI: Searched entire block, no RSDP was found.
 > What's RSDP?

A pointer to ACPI tables. It can reside in multiple places.
The first attempt failed but...

 > ACPI: RSDP located at physical address c00f6700
 > RSD PTR  v0 [PTLTD ]

This one succeeded, so no problem here.

 > CPU 0 (0x0000) enabledProcessor #0 Unknown CPU [15:2] APIC version 1=
6
 >=20
 > LAPIC (acpi_id[0x0001] id[0x6] enabled[1])
 > CPU 1 (0x0600) enabledProcessor #6 Unknown CPU [15:2] APIC version 1=
6
 >=20
 > LAPIC (acpi_id[0x0002] id[0x1] enabled[1])
 > CPU 2 (0x0100) enabledProcessor #1 Unknown CPU [15:2] APIC version 1=
6
 >=20
 > LAPIC (acpi_id[0x0003] id[0x7] enabled[1])
 > CPU 3 (0x0700) enabledProcessor #7 Unknown CPU [15:2] APIC version 1=
6
 >=20
 > ** Why does it say unknown, It's Xeon P4 2.4ghz ( and why does it fi=
rst find
 > the correct name later )

This is the APIC ID->Name translation. .19 didn't have P4 Xeon in the
list. Should be fixed in 2.4.20rc

 >  WARNING: unexpected IO-APIC, please mail
 >           to linux-smp@vger.kernel.org
 >=20
 > ... What does this error mean? :D

IO-APIC isn't in the whitelist in 2.4.19
This is ok, as it still gets used. .20rc1 should have this fixed.

 > **  What about hyperthreading?.. Is it already enabled? ( I enabled =
it in
 > the bios ) Dosent the kernel want to say anything cool about it that=
 it use
 > it? besides 4 processors.

And that's not 'cool' enough ? 8-)
If there are only 2 physical CPUs there, then this is working fine.
2.4.20rc2 will also print nice things in /proc/cpuinfo for you.

        Dave

--=20
| Dave Jones.        http://www.codemonkey.org.uk
| SuSE Labs