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Bug 426057 - NMI code does not support AMD family 0x6
NMI code does not support AMD family 0x6
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
low Severity low
: rc
: ---
Assigned To: Bhavna Sarathy
Red Hat Kernel QE team
Depends On:
  Show dependency treegraph
Reported: 2007-12-17 21:09 EST by Qian Cai
Modified: 2009-05-01 12:41 EDT (History)
6 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2009-05-01 12:41:09 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
/proc/cpuinfo (402 bytes, text/plain)
2007-12-17 21:09 EST, Qian Cai
no flags Details
uname -ra (114 bytes, text/plain)
2007-12-17 21:10 EST, Qian Cai
no flags Details
/proc/interrupts (588 bytes, text/plain)
2007-12-17 21:11 EST, Qian Cai
no flags Details
dmesg when nmi_watchdog=1 (13.70 KB, text/plain)
2007-12-17 21:11 EST, Qian Cai
no flags Details
dmesg when nmi_watchdog=2 (13.67 KB, text/plain)
2007-12-17 21:11 EST, Qian Cai
no flags Details

  None (edit)
Description Qian Cai 2007-12-17 21:09:31 EST
Description of problem:
NMI watchdog does not work for machines with AMD family 0x6 processors.

Version-Release number of selected component (if applicable):
Not work for the latest 4.6.z kernel (2.6.9-67.0.1) too.

How reproducible:

Steps to Reproduce:
reserved athlon3.rhts.boston.redhat.com (i386) from RHTS. Booted it with either
nmi_watchdog=1 or nmi_watchdog=2.
Actual results:
NMI count is always zero in /proc/interrupts, and also the following appeared in

powernow-k8: Processor cpuid 621 not supported
Testing NMI watchdog ... CPU#0: NMI appears to be stuck (0->0)!

Expected results:
NMI count should be increment.

Additional info:
See attachments for /proc/cpuinfo, /proc/interrupts, uname -ra, and dmesg.
Comment 1 Qian Cai 2007-12-17 21:09:31 EST
Created attachment 289838 [details]
Comment 2 Qian Cai 2007-12-17 21:10:40 EST
Created attachment 289839 [details]
uname -ra
Comment 3 Qian Cai 2007-12-17 21:11:09 EST
Created attachment 289840 [details]
Comment 4 Qian Cai 2007-12-17 21:11:36 EST
Created attachment 289841 [details]
dmesg when nmi_watchdog=1
Comment 5 Qian Cai 2007-12-17 21:11:59 EST
Created attachment 289842 [details]
dmesg when nmi_watchdog=2
Comment 10 Prarit Bhargava 2007-12-18 11:21:36 EST
Bhavana, AFAWCT family 0x6 + NMI has never worked.  Did AMD put an explicit
request in to get this working?

I thought the earlier bugs were for family 15 & 16 ...

Comment 11 Qian Cai 2009-05-01 12:41:09 EDT
I'll close this one out due to NMI on this old type of processor seems never working before.

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