> > BTW, what is the purpose of this series. If I understand it correctly, you only want to > use the in-kernel lapic and leave the others (pic, ioapic) in userspace, what is the > benefit of it? The purpose is to achieve the security benefit of removing some of the interrupt handling into userspace, without incurring a significant performance penalty. If you move the entire IRQCHIP into userspace, we've seen perf impacts from 15-200% depending on the workload. With this patch series, we're seeing perf penalty <1% on our tests (TCP_RR latency, TCP throughput, and Disk I/O). See (https://lwn.net/Articles/619332/) > > Thanks, > Feng > >> -- 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
