https://bugzilla.kernel.org/show_bug.cgi?id=50891 Summary: The smp_affinity cannot work correctly when PCI passthrough device using msi/msi-x with KVM Product: Virtualization Version: unspecified Kernel Version: 3.7-rc6 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm AssignedTo: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx ReportedBy: yilikernel@xxxxxxxxx CC: kvm@xxxxxxxxxxxxxxx Regression: No 1: passthrough a netcard (Brodcom BCM5716S) to the guest os 2: ifup the netcard, the card will use msi-x interrupt default, and close the irqbalance service 3: echo 4 > cat /proc/irq/NETCARDIRQ/smp_affinity, so we assume the vcpu2 handle the irq. 4: we have set <vcpupin vcpu='2' cpuset='1'/> and set the irq kvm:pci-bus to the pcpu1 on the host. we think this configure will reduce the ipi interrupt when inject interrupt to the guest os. but this irq is not only handle on vcpu2. it is not expect。 -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug. You are watching the assignee of the bug.-- 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
