Bug 135272 (IT_51118)

Summary: "MP table in the EBDA can be UNSAFE" message on x365
Product: Red Hat Enterprise Linux 2.1 Reporter: Bastien Nocera <bnocera>
Component: kernelAssignee: Jason Baron <jbaron>
Status: CLOSED NOTABUG QA Contact: Brian Brock <bbrock>
Severity: medium Docs Contact:
Priority: medium    
Version: 2.1CC: knoel, riel, tao
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Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2004-10-28 15:51:22 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Bastien Nocera 2004-10-11 15:59:13 UTC
Description of problem:
In dmesg after booting an IBM x365 with the 2.4.9-e.49summit kernel:
"kernel: WARNING: MP table in the EBDA can be UNSAFE, contact
linux-smp@vger.kernel.org if you experience SMP problems!"

booting an earlier kernel (2.4.9-e.40summit), there's only this message:
WARNING: unexpected IO-APIC, please mail  to linux-smp@vger.kernel.org 

I believe the problem (MP table warning, as opposed to unknown
IO_APIC) could be due to this changelog entry:
* Sun Jun 20 2004 Jason Baron <jbaron@redhat.com>
                                                                     
                     - elminate unexpected ioapic messages (Jim Paradis)

The BIOS is dated from 08/18/2004 (1.08) and is the current latest for
this machine.

Comment 1 Bastien Nocera 2004-10-11 16:05:38 UTC
Let us know which pieces of information are required to solve this.

Comment 2 Bastien Nocera 2004-10-28 15:51:22 UTC
Warning is harmless, and, apparently, only happens with lilo.