Messages in this thread | | | Subject | Re: [PATCH] i386 Time: Avoid PIT SMP lockups | From | Andi Kleen <> | Date | 18 Oct 2006 18:27:14 +0200 |
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"Maciej W. Rozycki" <macro@linux-mips.org> writes:
> On Wed, 11 Oct 2006, Andrew Morton wrote: > > > So this patch has the potential to screw up people who have 2-way or 4-way, > > no hpet/pm-timer and dodgy TSCs. > > Note that all APIC-based SMP systems (even these rare i486 beasts) by > definition do have local APIC timers, one per CPU, with a reasonable > resolution which could likely be used instead.
It wouldn't work on dual core laptop chipsets which support C3 and where the APIC timer stops during C3.
I had a apicrunsmaintimer option for some time on x86-64 but it broke on a few other non laptop machines for unknown reasons too, so I cannot really recommend it.
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