Bug 488018

Summary:	NMI appears to be stuck (460) - NMI received for unknown reason 21
Product:	Red Hat Enterprise Linux 4	Reporter:	Qian Cai <qcai>
Component:	kernel	Assignee:	Aristeu Rozanski <arozansk>
Status:	CLOSED ERRATA	QA Contact:	Red Hat Kernel QE team <kernel-qe>
Severity:	high	Docs Contact:
Priority:	high
Version:	4.7.z	CC:	dhoward, fluo, mgahagan, syeghiay, tao, vmayatsk
Target Milestone:	rc	Keywords:	Regression
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-05-18 19:15:06 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	458859
Bug Blocks:

Description Qian Cai 2009-03-02 07:41:08 UTC

Description of problem:
It looks recently 4.7.z update introduced a regression for an x86-64 machine -- some bad messages,

...
AMD Opteron(tm) Processor 846 stepping 08
Total of 4 processors activated (15942.96 BogoMIPS).
Using local APIC timer interrupts.
Detected 12.452 MHz APIC timer.
checking TSC synchronization across 4 CPUs: passed.
Brought up 4 CPUs
Disabling vsyscall due to use of PM timer
time.c: Using PM based timekeeping.
testing NMI watchdog ... CPU#1: NMI appears to be stuck (460)!
checking if image is initramfs... it is
NET: Registered protocol family 16
PCI: Using configuration type 1
mtrr: v2.0 (20020519)
Uhhuh. NMI received for unknown reason 21.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?
ACPI: Subsystem revision 20040816
ACPI: Interpreter enabled
ACPI: Using IOAPIC for interrupt routing
...

The previous released kernel 2.6.9-78.0.13.EL has no such problem. I have seen this on both smp and largesmp kernels.

Version-Release number of selected component (if applicable):
kernel-smp-2.6.9-78.0.15.EL
kernel-largesmp-2.6.9-78.0.15.EL

How reproducible:
always

Steps to Reproduce:
1. reserve bigisis.rhts.bos.redhat.com (x86-64) from RHTS
2. boot kernel-smp-2.6.9-78.0.15.EL
3. grep -i nmi /var/log/dmesg

Actual results:
testing NMI watchdog ... CPU#1: NMI appears to be stuck (460)!
Uhhuh. NMI received for unknown reason 21.

Expected results:
No such information

Additional info:
RHTS links,
http://rhts.redhat.com/cgi-bin/rhts/test_log.cgi?id=7040616

Bad dmesg,
dmesg.2.6.9-78.0.15.ELsmp

Good dmesg using kernel-smp-2.6.9-78.0.13.EL,
dmesg.orig

Comment 1 Qian Cai 2009-03-02 07:51:20 UTC

The same problem has been seen since 2.6.9-78.0.14.EL kernel.

Comment 3 Don Howard 2009-03-03 00:11:01 UTC

Should this be marked as a duplicate of bz 479184 ?

Comment 11 Qian Cai 2009-03-05 03:05:03 UTC

Thanks Aristeu. Does kernel-smp-2.6.9-82.EL.488018_2.x86_64.rpm suppose to contain the patch in comment #9? If so, I confirm that it solves the problem on that machine.

Comment 12 Aristeu Rozanski 2009-03-05 13:14:23 UTC

CAI, yes, that kernel contains the patch attached on this BZ.

Comment 14 Prarit Bhargava 2009-03-10 15:16:14 UTC

*** Bug 488269 has been marked as a duplicate of this bug. ***

Comment 17 RHEL Program Management 2009-03-16 15:38:40 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 19 Vivek Goyal 2009-03-17 15:01:44 UTC

Committed in 84.EL . RPMS are available at http://people.redhat.com/vgoyal/rhel4/

Comment 22 Luo Fei 2009-04-20 07:52:47 UTC

The tests passed for 2.6.9-88.EL(up,smp,largesmp) on bigisis.rhts.bos.redhat.com(x86_64)...
[root@bigisis ~]# grep -i nmi /var/log/dmesg
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
testing NMI watchdog ... OK.

Comment 23 Luo Fei 2009-04-20 07:59:22 UTC

The tests passed for 2.6.9-88.EL(up,smp,largesmp) on bigisis.rhts.bos.redhat.com(x86_64)...
[root@bigisis ~]# grep -i nmi /var/log/dmesg
ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x02] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x03] high edge lint[0x1])
testing NMI watchdog ... OK.

Comment 25 errata-xmlrpc 2009-05-18 19:15:06 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2009-1024.html