Bug 497508 - testing NMI watchdog ... CPU#0: NMI appears to be stuck (16)!
testing NMI watchdog ... CPU#0: NMI appears to be stuck (16)!
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
high Severity high
: rc
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Assigned To: Red Hat Kernel Manager
Red Hat Kernel QE team
Depends On:
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Reported: 2009-04-24 07:53 EDT by CAI Qian
Modified: 2009-04-24 09:30 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2009-04-24 09:30:29 EDT
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Description CAI Qian 2009-04-24 07:53:36 EDT
Description of problem:
If we added nmi_watchdog=1 to the kernel, the we have seen the following messages on a RHTS HP DL580G5 server.

Total of 16 processors activated (76799.30 BogoMIPS).
activating NMI Watchdog ... done.
Using local APIC timer interrupts.
Detected 16.667 MHz APIC timer.
checking TSC synchronization across 16 CPUs: passed.
Brought up 16 CPUs
time.c: Using HPET/TSC based timekeeping.
testing NMI watchdog ... CPU#0: NMI appears to be stuck (16)!
NMI watchdog: disabling NMI delivery on LINT0 for all CPUs

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How reproducible:
Comment 1 CAI Qian 2009-04-24 09:30:29 EDT
aris> caiqian, not all machines work with both NMI watchdog modes
<caiqian> aris, without nmi_watchdog it works. Should I close it?
<aris> yes
<aris> x86_64 will select automatically the method

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