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List:       linux-poweredge
Subject:    Possibly defective BIOS detected (irqtable) on a PE8450
From:       Marc Schmitt <schmitt () inf ! ethz ! ch>
Date:       2002-12-26 13:33:42
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Hi all,

On a PE8450, I see the following kernel boot message:

Dec 22 17:32:17 sim0 kernel: Linux version 2.4.18-18.7.xsmp 
(bhcompile@bugs.devel.redhat.com) (gcc version 2.96 20000731 (Red Hat 
Linux 7.3 2.96-112)) #1 SMP Wed Nov 13 19:01:42 EST 2002
Dec 22 17:32:17 sim0 kernel: BIOS-provided physical RAM map:
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000000000000 - 
000000000009d400 (usable)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 000000000009d400 - 
00000000000a0000 (reserved)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 00000000000e0000 - 
0000000000100000 (reserved)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000000100000 - 
0000000003ff8000 (usable)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000003ff8000 - 
0000000003fffc00 (ACPI data)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000003fffc00 - 
0000000004000000 (ACPI NVS)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000004000000 - 
00000000e0000000 (usable)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 00000000fec00000 - 
0000000100000000 (reserved)
Dec 22 17:32:17 sim0 kernel:  BIOS-e820: 0000000100000000 - 
0000000120000000 (usable)
Dec 22 17:32:17 sim0 kernel: Warning only 4GB will be used.
Dec 22 17:32:17 sim0 kernel: Use a PAE enabled kernel.
Dec 22 17:32:17 sim0 kernel: 3200MB HIGHMEM available.
Dec 22 17:32:17 sim0 kernel: 896MB LOWMEM available.
Dec 22 17:32:17 sim0 kernel: found SMP MP-table at 000f6570
Dec 22 17:32:17 sim0 kernel: hm, page 000f6000 reserved twice.
Dec 22 17:32:17 sim0 kernel: hm, page 000f7000 reserved twice.
Dec 22 17:32:17 sim0 kernel: hm, page 0009d000 reserved twice.
Dec 22 17:32:17 sim0 kernel: hm, page 0009e000 reserved twice.
Dec 22 17:32:17 sim0 kernel: On node 0 totalpages: 1048576
Dec 22 17:32:17 sim0 kernel: zone(0): 4096 pages.
Dec 22 17:32:17 sim0 kernel: zone(1): 225280 pages.
Dec 22 17:32:17 sim0 kernel: zone(2): 819200 pages.
Dec 22 17:32:17 sim0 kernel: Intel MultiProcessor Specification v1.4
Dec 22 17:32:17 sim0 kernel:     Virtual Wire compatibility mode.
Dec 22 17:32:17 sim0 kernel: OEM ID: INTEL    Product ID: OCPRF100     
APIC at: 0xFEE00000
Dec 22 17:32:17 sim0 kernel: Processor #7 Pentium(tm) Pro APIC version 17
Dec 22 17:32:17 sim0 kernel: Processor #0 Pentium(tm) Pro APIC version 17
Dec 22 17:32:17 sim0 kernel: Processor #1 Pentium(tm) Pro APIC version 17
Dec 22 17:32:17 sim0 kernel: Processor #2 Pentium(tm) Pro APIC version 17
Dec 22 17:32:18 sim0 kernel: Processor #3 Pentium(tm) Pro APIC version 17
Dec 22 17:32:18 sim0 kernel: Processor #4 Pentium(tm) Pro APIC version 17
Dec 22 17:32:18 sim0 kernel: Processor #5 Pentium(tm) Pro APIC version 17
Dec 22 17:32:18 sim0 kernel: Processor #6 Pentium(tm) Pro APIC version 17
Dec 22 17:32:18 sim0 kernel: I/O APIC #8 Version 19 at 0xFEC00000.
Dec 22 17:32:18 sim0 kernel: Processors: 8
Dec 22 17:32:18 sim0 kernel:  *** Possibly defective BIOS detected 
(irqtable)
Dec 22 17:32:18 sim0 kernel:  *** Many BIOSes matching this signature 
have incorrect IRQ routing tables.
Dec 22 17:32:18 sim0 kernel:  *** If you see IRQ problems, in particular 
SCSI resets and hangs at boot
Dec 22 17:32:18 sim0 kernel:  *** contact your hardware vendor and ask 
about updates.
Dec 22 17:32:18 sim0 kernel:  *** Building an SMP kernel may evade the 
bug some of the time.

The machine has the latest BIOS (A06) and I'm using an SMP kernel. I 
don't see any SCSI resets or hangs at boot, nevertheless, the message 
worries me a bit. Someone knows more about this issue and if the warning 
can be safely ignored on a PE8450? Thanks.

Regards,
    Marc

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