Non-maskable interrupt

Hi, everyone

In my system, NMI intrrupt counter is increased continuously, which I found in /proc/interrupts.
How can I find the reasons of NMI interrupts?

Best Regards
Kim.

How fast are they increasing? A few an hour? A few a minute? 50 or 60 a second?

What does 'grep -i nmi your-config-here' return?
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2014? 10? 23? 02:37? Valdis.Kletnieks at vt.edu ?(?) ? ?:

once per second...
and I found the nmi couter is same with PMI.

My kernel config about NMI is as follows :

CONFIG_DEBUG_NMI_TIMEOUT=5
CONFIG_HAVE_FTRACE_NMI_ENTER=y
CONFIG_FTRACE_NMI_ENTER=y

Thanks

I bet 'cat /proc/sys/kernel/nmi_watchdog' returns '1'.

See Documentation/lockup-watchdogs.txt

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2014? 10? 23? 11:06? Valdis.Kletnieks at vt.edu ?(?) ? ?:

In my kernel, there is no kernel paramter of nmi_watchdog and I cannot find the /proc/sys/kernel/nmi_watchdog file in my system.

Is CONFIG_HARDLOCKUP_DETECTOR not set in your .config?

Is CONFIG_LOCKUP_DETECTOR not set in your .config?

Paul Bolle