Re: add back pending timer irqs for kernel APIC timer

Dong, Eddie
2007-08-13T13:29:00Z

>
>
> Note that my old lapic branch did a similar "tdf" thing as well and it
> worked quite nicely, so I think Eddie is on the right track with
> adding this.

I just copied the whole APIC timer stuff from your old patch at that
time as TODO. maybe I missed something :-(

Time virtualization has quit a long way to go and it is quit very
beginning now. Something in my plan:

1: Current 3 patches to fix the pending irq issues and accumulate issue.

2: stop hrtimer when the guest is descheduled to increase scalibility
and remove apic->lock.

3: Use scale + shift like Xen did to make sure no internal overflow if
we run guest contiguously for long time say 2 years.

Above 1-3 is already in Xen and we just need to port.

4: Should we use hrtimer? How efficieny it is?

Will u be able to help together?
thx,eddie