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    SubjectRe: NMI watchdog
    On 2007.10.12 11:18:24 +0200, John Sigler wrote:
    > Hello,
    >
    > I'm experiencing a full system lockup. I'm using an out-of-tree driver
    > which I suspect is responsible. I'm trying to enable the NMI watchdog.
    >
    > # cat /proc/version
    > Linux version 2.6.22.1-rt9 (gcc version 3.4.6) #1 PREEMPT RT Tue Oct 9
    > 12:25:47 CEST 2007
    >
    > # cat /proc/cmdline
    > ro root=/dev/hdc1 console=ttyS0,57600n8 console=tty0 panic=3 apic=debug
    > nmi_watchdog=2
    >
    > However, after boot, the NMI count does not change.
    >
    > # cat /proc/interrupts ; sleep 10 ; cat /proc/interrupts

    Try running some cpu hog in the background. The performance counters get
    increased only when the CPU is actually doing something. On a mostly
    idle system, it can take quite a while for the next NMI to show up.

    Björn
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