On 19/08/2015 20:55, Wanpeng Li wrote: >> The disadvantage is that it adds an overhead of one bit check for all >> kernel exits. A quick tracing shows that the ratio of userspace exits >> after boot is about 1/5 and in subsequent run of nmap and kernel compile >> has about 1/60, so the check should not regress global performance. >> >> All signal_pending() calls are userspace exit requests, so we add a >> check for KVM_REQ_EXIT there. There is one omitted call in kvm_vcpu_run >> because KVM_REQ_EXIT is implied in earlier check for requests. > > Actually I see more SIGUSR1 signals are intercepted by signal_pending() > in vcpu_enter_guest() and vcpu_run() w/ win7 guest and kernel_irqchip=off. You need more patches on the QEMU side. I tested a version that is mostly okay but not ready for upstream inclusion. Paolo -- 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
