Re: do_gettimeofday vs. rdtsc in the scheduler

From: John Levon (
Date: Fri Sep 20 2002 - 10:26:18 EST

On Thu, Sep 19, 2002 at 02:27:19PM +0100, Alan Cox wrote:

> > - There are plenty of laptops whose CPUs have local APICs but whose
> > BIOSen go berserk if you enable it. There are also plenty of laptops
> Frequently because we don't disable it again before any APM calls I
> suspect. When a CPU goes into sleep mode you must disable PMC and local
> apic timer interrupts.

Isn't this exactly what apic_pm_suspend() does ? Or is that in 2.5 only ?


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