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List:       linux-smp
Subject:    Re: WARNING at boot
From:       <rddunlap () osdl ! org>
Date:       2001-12-07 22:44:36
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On Fri, 7 Dec 2001, NICOLA PAROLINI wrote:

| we have a Dell Precision 530 Dual processors running redhat 7.1, Kernel
| 2.4.9-12smp that sometimes (twice/three times a week) just hung up for
| some unknown reason. In that case we have to hard reboot the machine.
|
| We have found that a strange warning issues at boot:
|
| .... register #01: 00178020
| .......     : max redirection entries: 0017
| .......     : IO APIC version: 0020
|  WARNING: unexpected IO-APIC, please mail
|           to linux-smp@vger.kernel.org
|  WARNING: unexpected IO-APIC, please mail
|           to linux-smp@vger.kernel.org
|
| Please find attached the intire log produced by dmesg.
|
| Could you please tell us if the warning is "serious" and if it may be
| related to our problem?

These warnings won't appear when you use Linux version 2.4.16 or
later.  They appear because 2.4.9 didn't recognize IO APIC version 20
or the '8' part of '00178020'.  Both of these have been added.
The warnings don't affect correct operation.

These warnings aren't related to whatever system hangs you are
having.  Is there any log information that is relevant to the hangs?
Any indications of the problem(s)?  What is the system doing
at the time of the hangs?

Regards,
-- 
~Randy

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