Messages in this thread | | | Date | Sat, 24 May 2003 15:11:06 -0400 (EDT) | From | Zwane Mwaikambo <> | Subject | Re: [RFC] Fix NMI watchdog documentation |
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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 CONFIG_X86_IO_APIC
Zwane
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