Hi I am experiencing very weird and hard to debug issue for me with live migration. After successfully migrating VM it is not usable. It responds to echo requests (for some time). When I am trying to 'ping' someone only the first packet appears on network interface (I am able to receive one echo response). Command 'sleep' hangs forever, htop shows black screen. The problem appears randomly. I have already tried kvm 1.6.0 and 1.5.0. Kernel on host and guest is 3.10.5 (tried 3.10.7 as well). All VMs are running and live migrating through libvirt 1.1.2 (tried previous versions as well). Guest and host OS is Debian jessie/sid. Here is a command line used by libvirt to run VM: qemu-system-x86_64 -machine accel=kvm:tcg -name instance-000008a0 -S -machine pc-i440fx-1.5,accel=kvm,usb=off -cpu SandyBridge,+erms,+smep,+fsgsbase,+rdrand,+f16c,+osxsave,+pcid,+pdcm,+xtpr,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid 573ab654-324c-4a5a-baf5-48d573c43a7d -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack Nova,version=2013.1.3,serial=40181e1b-dad7-dd11-bfb4-10bf487fde32,uuid=573ab654-324c-4a5a-baf5-48d573c43a7d -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-000008a0.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=rbd:cinder_volumes/volume-cb489a8b-7af5-4c2d-91ee-9e26de3c23cd:id=cinder_volumes:key=mykey8CgeK34UmGR/oWjLwnjnw==:auth_supported=cephx\;none,if=none,id=drive-virtio-disk0,format=raw,serial=cb489a8b-7af5-4c2d-91ee-9e26de3c23cd,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=rbd:cinder_volumes/volume-bcc2d707-aedf-4b0d-bfbd-66d18f39d63e:id=cinder_volumes:key=mykey8CgeK34UmGR/oWjLwnjnw==:auth_supported=cephx\;none,if=none,id=drive-virtio-disk1,format=raw,serial=bcc2d707-aedf-4b0d-bfbd-66d18f39d63e,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,id=virtio-disk1 -netdev tap,fd=26,id=hostnet0,vhost=on,vhostfd=27 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:e0:36:84,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/var/lib/nova/instances/573ab654-324c-4a5a-baf5-48d573c43a7d/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -device usb-tablet,id=input0 -vnc 127.0.0.1:1 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 Not using rbd does not help as well. There is nothing interesting in logs or at least I am not able to collect them properly. Could you please give me some hints how to provide more useful information for your? regards -- Maciej Gałkiewicz Shelly Cloud Sp. z o. o., Sysadmin http://shellycloud.com/, macias@xxxxxxxxxxxxxxx KRS: 0000440358 REGON: 101504426 -- 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
