Hey all, The other day I upgraded the kernel on one of my KVM hosts. I went from 2.6.34.1 to 2.6.35.7, and immediately I noticed that my Windows XP guests was now using significantly more CPU while idle, compared to the 2.6.34.1 kernel. All the Windows XP guests are running with -usbdevice tablet. Using the 2.6.34.1 kernel idle CPU usage for the Windows XP guests was sitting at ~5%, with spikes going as high as 10%. Using 2.6.35.7 these numbers were ~20%, with spikes going as high as 35%. Everything appeared to work as usual, except for this higher idle load. I'm using qemu-kvm 0.12.50. All images are raw. No SMP for the Windows XP guests. I downgraded to 2.6.34.7, and the CPU load pattern is now back to normal. The server is a Sun Fire X4270 (dual quad core Xeon 5520, 24GB RAM) running Slackware 13.1 x86_64. I've no idea whether this is intentional, or if it is a bug in the kernel, the KVM modules or in qemu-kvm. Regards, Thomas Løcke -- 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
