On Fri, 9 Dec 2005, Venkatesh Pallipadi wrote:
> On Fri, Dec 09, 2005 at 12:06:35AM -0800, Zwane Mwaikambo wrote:
> > 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).
> > >
> > > +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?
>
> +void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
> This is called by the IRQ0 timer interrupt handler, to check whether any CPUs
> have enrolled for this broadcast.
>
> +void switch_APIC_timer_to_ipi(void *cpumask);
> Called by acpi processor driver when it find out that a particular CPU can
> support C3 state (and it is an Intel CPU).
>
> +void switch_ipi_to_APIC_timer(void *cpumask);
> Called by acpi processor driver again to reset to APIC_timer when C3 is not
> supported by the CPU.
Well i was more curious as to where in the patchset the
switch_ipi_to_APIC_timer is used;
zwane@montezuma linux-2.6-hg-x86_64 {0:1} grep switch_ipi_to_APIC_timer /tmp/patch[1234]
/tmp/patch2:+void switch_ipi_to_APIC_timer(void *cpumask);
/tmp/patch2:+void switch_ipi_to_APIC_timer(void *cpumask)
/tmp/patch2:+EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
/tmp/patch4:+void switch_ipi_to_APIC_timer(void *cpumask)
/tmp/patch4:+EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
/tmp/patch4:+void switch_ipi_to_APIC_timer(void *cpumask);
Or will it only be used in future?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
