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    SubjectRe: [RFC][PATCH 2/3]i386,x86-64 Handle missing local APIC timer interrupts on C3 state
    On Thu, 8 Dec 2005, Venkatesh Pallipadi wrote:

    > Whenever we see that a CPU is capable of C3 (during ACPI cstate init), we
    > disable local APIC timer and switch to using a broadcast from external timer
    > interrupt (IRQ 0).
    >
    > Index: linux-2.6.15-rc3/include/asm-i386/apic.h
    > ===================================================================
    > --- linux-2.6.15-rc3.orig/include/asm-i386/apic.h
    > +++ linux-2.6.15-rc3/include/asm-i386/apic.h
    > @@ -132,6 +132,11 @@ extern unsigned int nmi_watchdog;
    >
    > extern int disable_timer_pin_1;
    >
    > +void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
    > +void switch_APIC_timer_to_ipi(void *cpumask);
    > +void switch_ipi_to_APIC_timer(void *cpumask);

    When is this used?
    -
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