Private bug reported:
To verify LM workable or not on Ubuntu20.04, we tried to LM on one machine:
[Test environment]：
OS: Ubuntu 20.04 Beta
Kernel: 5.4.0-21-generic
QEMU: 4.2.0 (Debian 1:4.2-3ubuntu4
[Platforms]
SKX-SP 2S, ICX-SP 2S
Reproduced Steps:
1.boot up first KVM guest :
qemu-system-x86_64 -enable-kvm \
-smp 4 \
-m 16G \
-cpu host \
-vnc :9 \
-drive
file=ubuntu_20.04_beta_legacy_cr.qcow,if=virtio,id=virtio-disk0,format=qcow2 \
-monitor stdio -vga virtio
2.boot up second KVM guest:
qemu-system-x86_64 -enable-kvm \
-smp 4 \
-m 16G \
-cpu host \
-vnc :8 \
-drive
file=ubuntu_20.04_beta_legacy_cr.qcow,if=virtio,id=virtio-disk0,format=qcow2 \
-serial mon:stdio \
-incoming tcp:localhost:6666
3.Try to live migrate from 1st KVM guest --> 2nd KVM :
in qemu command line :
(qemu) migrate -d tcp:localhost:6666
[Expect Result]
2nd KVM guest should boot up and with out any error.
[Actual result]
LM failed, the 2nd VM exit and there are fail error heppened.
1.# ./boot_vm_from.sh
QEMU 4.2.0 monitor - type 'help' for more information
(qemu) migrate -d tcp:localhost:6666
(qemu) qemu-system-x86_64: failed to save SaveStateEntry with id(name): 3(ram)
qemu-system-x86_64: Unable to write to socket: Connection reset by peer
qemu-system-x86_64: terminating on signal 2
2.# ./boot_vm_to.sh
qemu-system-x86_64: Length mismatch: 0000:00:02.0/vga.vram: 0x800000 in !=
0x1000000: Invalid argument
qemu-system-x86_64: error while loading state for instance 0x0 of device 'ram'
qemu-system-x86_64: load of migration failed: Invalid argument
3.# dmesg | grep fail
[ 3.407244] pci 0000:17:00.0: BAR 6: failed to assign [mem size 0x00080000
pref]
[ 3.407248] pci 0000:17:00.1: BAR 6: failed to assign [mem size 0x00080000
pref]
[ 3.624539] Initramfs unpacking failed: Decoding failed
** Affects: qemu (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "icx_lm_dmesg"
https://bugs.launchpad.net/bugs/1874200/+attachment/5357843/+files/icx_lm_dmesg
** Information type changed from Public to Private
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https://bugs.launchpad.net/bugs/1874200
Title:
[Bug][KVM] Live migration failed with ram loading fail error in dmesg
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