Messages in this thread | | | Date | Sat, 24 May 2003 21:43:55 +0200 | From | Carl-Daniel Hailfinger <> | Subject | Re: [RFC] Fix NMI watchdog documentation |
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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 > CONFIG_X86_IO_APIC
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.
Regards, Carl-Daniel -- http://www.hailfinger.org/
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