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settimer
2008 Sep 09
9
[PATCH 2/4] CPUIDLE: Avoid remnant LAPIC timer intr while force hpetbroadcast
...imer.
......: if entry C3 again, HPET will be forced reprogramed to now+small_slop.
......: if entry C2, no change to LAPIC.
18xxus: LAPIC timer expires unexpectedly if no C3 entries after 10xxus.
>From above sequences, we can find this case will either introduce extra HPET intrs or put off the softtimer expiring.
This patch simply stops the LAPIC timer first (avoid immediate unnecessary expiring) and raise a softirq (continue the softtimer handling process, which will correct the LAPIC timer) when reprogram LAPIC timer fails.
Signed-off-by: Wei Gang <gang.wei@intel.com>
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