On Tue, Aug 23, 2016 at 04:47:44PM -0700, Rajat Jain wrote: > On Thu, Aug 18, 2016 at 1:59 PM, Patel, Mayurkumar > <mayurkumar.patel@xxxxxxxxx> wrote: > > > > So does it mean that the port would continue providing MSI if there has been > > any other events occurred apart from the event which is not cleared? If that > > is the case then it's not sure why the loop is still needed. > > I'd think that the loop is needed because we don't want to handle just > one event on one interrupt. We want to handle as many events as we can > (to keep the interrupt latency overhead low), that have happened > during the ISR invocation. And hence the loop. The Slot Status doesn't have to provide a single event at a time. But even if it does, this isn't exactly a performance path that would be hurt by having one interrupt per event, right? -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
