On Monday 04 May 2009 16:34:00 Avi Kivity wrote:
> Sheng Yang wrote:
> > On Monday 04 May 2009 16:25:55 Avi Kivity wrote:
> >> Sheng Yang wrote:
> >>> Disable interrupt at interrupt handler and enable it when guest ack is
> >>> for the level triggered interrupt, to prevent reinjected interrupt.
> >>> MSI/MSI-X don't need it.
> >>>
> >>> One possible problem is multiply same vector interrupt injected between
> >>> irq handler and scheduled work handler would be merged as one for
> >>> MSI/MSI-X. But AFAIK, the drivers handle it well.
> >>>
> >>> The patch fixed the oplin card performance issue(MSI-X performance is
> >>> half of MSI/INTx).
> >>>
> >>>
> >>> schedule_work(&assigned_dev->interrupt_work);
> >>>
> >>> - disable_irq_nosync(irq);
> >>> - assigned_dev->host_irq_disabled = true;
> >>> + if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
> >>> + disable_irq_nosync(irq);
> >>> + assigned_dev->host_irq_disabled = true;
> >>> + }
> >>>
> >>> out:
> >>> spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
> >>
> >> I don't have the spin_lock_irqrestore() here. The patch applies, but
> >> with fuzz. Am I missing a patch?
> >
> > Oh, it's Marcelo's patchset...
> >
> > [patch 0/4] use smp_send_reschedule in vcpu_kick / assigned dev host intx
> > race fix
>
> Okay, I am working my queue in reverse order :)
>
> But please note dependencies on other patches for me.
Yes, sorry for totally forgot (mine based on his patchset)... :(
--
regards
Yang, Sheng
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