Bug 135272 – "MP table in the EBDA can be UNSAFE" message on x365

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 135272 - (IT_51118) "MP table in the EBDA can be UNSAFE" message on x365

Summary:	"MP table in the EBDA can be UNSAFE" message on x365

Status:	CLOSED NOTABUG

Aliases:	IT_51118

Product:	Red Hat Enterprise Linux 2.1
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	2.1
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Jason Baron
QA Contact:	Brian Brock
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2004-10-11 11:59 EDT by Bastien Nocera
Modified:	2013-03-06 00:57 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2004-10-28 11:51:22 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Bastien Nocera 2004-10-11 11:59:13 EDT

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 12:05:38 EDT

Let us know which pieces of information are required to solve this.

Comment 2 Bastien Nocera 2004-10-28 11:51:22 EDT

Warning is harmless, and, apparently, only happens with lilo.

Note You need to log in before you can comment on or make changes to this bug.