Public bug reported:
Binary package hint: kvm
1. Start KVM on host A
2. Make heavy I/O in guest, e.g. while true; do dd if=/dev/zero of=testfile
bs=1M count=1k; done
3. Live-migrate to host B
4. Guest freezes (almost 100% reproducible)
Guest responds to ping and sysrq, but all processes are locked hard so I
can't type a command from console/ssh.
Live migration works well when guest is idle (when skipped step 2).
Both hosts are jaunty, guest is lenny (linux-image-2.6.26-1-686).
With virtio-block, guest hangs forever, but with ide, guest resumes in several
ten seconds after resetting ide0 by itself.
Shared storage is LVM logical volume on DRBD.
KVM command line:
kvm -name lenny -vnc none -k ja -daemonize -m 128 -drive
file=/dev/starvm/lenny.root,if=virtio,index=0,boot=on -drive
file=/dev/starvm/lenny.swap,if=virtio,index=1 -net
nic,vlan=0,macaddr=00:1A:4A:7e:23:59,model=virtio -net
tap,vlan=0,script=/usr/local/vmm/ifup-br1,downscript=no -serial
telnet:10.0.0.2:11430,server,nowait -monitor
telnet:10.0.0.2:11431,server,nowait -incoming tcp:10.0.0.2:11432
** Affects: kvm (Ubuntu)
Importance: Undecided
Status: New
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Block I/O crashes after migration
https://bugs.launchpad.net/bugs/341682
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