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    SubjectRe: [RFC] Fix NMI watchdog documentation
    Zwane Mwaikambo wrote:
    > On Sat, 24 May 2003, Zwane Mwaikambo wrote:
    >>For nmi_watchdog=1 the NMI watchdog uses the programmable interval timer
    >>to trigger interrupt events via the IOAPIC. with nmi_watchdog=2 we use the
    >>performance counters on the processor to trigger these events. IOAPICs
    >>are generally found on SMP motherboards (but there are UP boards with
    >>them, it's chipset dependent). Generally i686+ (save some Athlons and a
    >>few other processors) will work with nmi_watchdog=2.
    > Forgot this bit;
    > w/ CONFIG_X86_LOCAL_APIC=y you only have nmi_watchdog=2
    > w/ CONFIG_X86_IO_APIC=y you have nmi_watchdog=1 and 2
    > w/ CONFIG_SMP you have nmi_watchdog=1 and 2 as it depends on

    Marc-Christian Petersen wrote:
    > the nmi_watchdog is always compiled in if you select "CONFIG_X86_LOCAL_APIC"
    > see "arch/i386/kernel/Makefile"

    Thanks to all who responded. I will prepare a patch for
    Documentation/nmi_watchdog.txt to clarify it and send the patch to Linus
    and Marcelo.


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