On Wed, Sep 14, 2016 at 11:48:32PM +0200, Paolo Bonzini wrote: > When userspace sends KVM_SET_LAPIC, KVM schedules a check between > the vCPU's IRR and ISR and the IOAPIC redirection table, in order > to re-establish the IOAPIC's dest_map (the list of CPUs servicing > the real-time clock interrupt with the corresponding vectors). > > However, __rtc_irq_eoi_tracking_restore_one was forgetting to > set dest_map->vectors. Because of this, the IOAPIC did not process > the real-time clock interrupt EOI, ioapic->rtc_status.pending_eoi > got stuck at a non-zero value, and further RTC interrupts were > reported to userspace as coalesced. > > Fixes: 9e4aabe2bb3454c83dac8139cf9974503ee044db > Fixes: 4d99ba898dd0c521ca6cdfdde55c9b58aea3cb3d > Cc: Joerg Roedel <jroedel@xxxxxxx> > Cc: David Gilbert <dgilbert@xxxxxxxxxx> > Cc: Radim Krčmář <rkrcmar@xxxxxxxxxx> > Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Good catch, thanks for fixing this. -- 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
