Hi Tomoki I tried your smart patch "cpu isolation and direct interrupt delivery", http://article.gmane.org/gmane.linux.kernel/1353803 got output when I run qemu kvm_set_slave_cpu: Invalid argument So I wonder * Did I misuse your patches? * How is the offlined CPU assigned? or the Guest OS will automaticly detect and use it? details of my trial: - based on v3.6-rc4 and qemu-kvm-1.0 as you commented - boot the kernel with intel_iommu=on BOOT_IMAGE=(hd0,1)/boot/vmlinuz-3.6.0-rc4+ root=/dev/sda1 rhgb quiet selinux=0 intel_iommu=on - the offlined cpu # cat /sys/devices/system/cpu/offline 23 - qemu command line qemu-kvm -enable-kvm -m 1024 -cpu qemu64,+x2apic -no-kvm-pit -serial pty -nographic -drive file=/mnt/sdb/vmtest/testfc.qcow2,if=virtio,index=0,format=qcow2 -spice port=12000,addr=186.100.8.171,disable-ticketing,plaintext-channel=main,plaintext-channel=playback,plaintext-channel=record,image-compression=auto_glz Thanks, Yang Minqiang-- 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
