Hello KVM, I'm seeing something similar to this (http://thread.gmane.org/gmane.comp.emulators.kvm.devel/100592) as well when doing live migrations on Ubuntu 12.04 (Host and Guest) with a backported libvirt 1.0 and qemu-kvm 1.2 (improved performance for live migrations on guests with large memory guests is great!) The default libvirt 0.9.8 and qemu-kvm 1.0 have the same issue. Kernel is 3.2.0-34-generic and eglicb 2.15 on both host/guest. I'm seeing similar issues with both virtio and ide bus. Hugetblfs is not used, but transparent hugepages are. Host machines are dual core Xeon E5-2660 processors. I tried disabling EPT but that doesn't seem to make a difference so I don't think it's a requirement to reproduce. If I use Ubuntu 10.04 guest with eglibc 2.11 and any of these kernels I don't seem to have the issue: linux-image-2.6.32-32-server - 2.6.32-32.62 linux-image-2.6.32-38-server - 2.6.32-38.83 linux-image-2.6.32-43-server - 2.6.32-43.97 linux-image-2.6.35-32-server - 2.6.35-32.68~lucid1 linux-image-2.6.38-16-server - 2.6.38-16.67~lucid1 linux-image-3.0.0-26-server - 3.0.0-26.43~lucid1 linux-image-3.2-5 - mainline 3.2.5 kernel I'm guess it's a libc issue (or at least a libc change causing the issue) as it doesn't seem to a be kernel related. I'll try other distributions as a guest (probably Debian/Ubuntu) with newer libc's and see if I can pinpoint the issue to a libc version. Any other ideas? Shared disk backend is clvm/LV via FC to EMC SAN, not sure what else might be relevant. Thanks, Mark ______________________________________________ See http://www.peak6.com/email_disclaimer/ for terms and conditions related to this email -- 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
