On 04/23/2010 07:05 AM, Avi Kivity wrote: > On 04/22/2010 10:55 PM, Gleb Natapov wrote: >> >> >>>> What about converting PIC/IOAPIC mutexes into spinlocks? >>>> >>> Works for me, but on large guests the spinning will be noticeable. >>> I believe. >>> >> For interrupts going through IOPIC, but we know this is not scalable >> anyway. >> > > Yes. We also wanted to convert the ioapic/pic to spinlocks so we could > queue the interrupt from the PIT directly instead of using > KVM_REQ_PENDING_TIMER which keeps confusing me. Chris Lalancette posted > a patchset for this a while back but it was never completed. Yeah, I'm sorry I never completed it. It turns out that with the HPET changes that went in around the time I was looking at it, that set of patches wasn't really required to fix the problem I was seeing with kdump. That being said, if it's useful to somebody, I can repost the patches (though they are woefully out-of-date now). Let me know if you want to see them again. -- Chris Lalancette -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
