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SubjectRe: [RFC][PATCH] nmi watchdog: handle NMI_IO_APIC on nmi_watchdog

* Aristeu Rozanski <aris@ruivo.org> wrote:

> This patch includes code to handle NMI_IO_APIC enabling/disabling by
> nmi_watchdog proc file.

hm:

> +static void disable_ioapic_nmi_watchdog(void)
> +{
> + on_each_cpu(stop_apic_nmi_watchdog, NULL, 0, 1);
> +}

stop_apic_nmi_watchdog() doesnt currently properly disable the
generation of NMIs when they come from an IO-APIC, so this will need
more fixes i believe. One approach would be to save the IO-APIC id and
pin when the watchdog is set up, and use it later on to poke that
IO-APIC register to disable NMI generation there.

Ingo


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