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[Qemu-devel] [Bug 1603970] Re: KVM freezes after live migration (AMD 418
From: |
Kilian Ries |
Subject: |
[Qemu-devel] [Bug 1603970] Re: KVM freezes after live migration (AMD 4184 -> 4234) |
Date: |
Mon, 18 Jul 2016 15:30:02 -0000 |
Found another post from a user in the proxmox forum which has a similar
problem (only difference are the CPUs in use):
https://forum.proxmox.com/threads/vm-freezeing-with-vcpu-at-100-when-
doing-livemigration.25987/
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https://bugs.launchpad.net/bugs/1603970
Title:
KVM freezes after live migration (AMD 4184 -> 4234)
Status in QEMU:
New
Bug description:
Hi,
i have two host systems with different CPU types:
Host A:
AMD Opteron(tm) Processor 4234
Host B:
AMD Opteron(tm) Processor 4184
Live migration from B -> A works as expected, migration from A -> B
always ends in a freezed KVM. If the KVM is frozen, VNC output is
still present, however, you can't type anything. CPU usage is always
at 100% for one core (so if i set two cores, one is at 100% the other
one at 0% usage).
My command to launch the KVM is the following:
/usr/bin/kvm -id 104 -chardev socket,id=qmp,path=/var/run/qemu-
server/104.qmp,server,nowait -mon chardev=qmp,mode=control -pidfile
/var/run/qemu-server/104.pid -daemonize -smbios
type=1,uuid=26dd83a9-b9bd-4641-8016-c55f255f1bdf -name kilian-test
-smp 1,sockets=1,cores=1,maxcpus=1 -nodefaults -boot menu=on,strict=on
,reboot-timeout=1000 -vga cirrus -vnc unix:/var/run/qemu-
server/104.vnc,x509,password -cpu
kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce -m 512 -object
memory-backend-ram,id=ram-node0,size=512M -numa
node,nodeid=0,cpus=0,memdev=ram-node0 -k de -device pci-
bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f -device pci-
bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e -device piix3-usb-
uhci,id=uhci,bus=pci.0,addr=0x1.0x2 -device usb-
tablet,id=tablet,bus=uhci.0,port=1 -device virtio-balloon-
pci,id=balloon0,bus=pci.0,addr=0x3 -iscsi initiator-
name=iqn.1993-08.org.debian:01:5ca1e9d334b2 -drive
file=/mnt/pve/nfs_synology/images/104/vm-104-disk-2.qcow2,if=none,id
=drive-virtio0,format=qcow2,cache=none,aio=native,detect-zeroes=on
-device virtio-blk-pci,drive=drive-
virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100 -netdev
type=tap,id=net0,ifname=tap104i0,script=/var/lib/qemu-server/pve-
bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on -device
virtio-net-
pci,mac=66:33:31:36:35:36,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300
KVM / QEMU version: QEMU emulator version 2.5.1.1
I have tried to set different CPU types, but no one works (qemu64,
vm64, Opteron_G1, ...).
I have found an email from 2014 where another user reports exactly the same
problem:
http://lists.gnu.org/archive/html/qemu-discuss/2014-02/msg00002.html
Greets
Kilian
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