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[Qemu-devel] [Bug 1626596] [NEW] Lockup with vhost network
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Subject: |
[Qemu-devel] [Bug 1626596] [NEW] Lockup with vhost network |
Date: |
Thu, 22 Sep 2016 14:48:07 -0000 |
Public bug reported:
After using Qemu in this configuration successfully for quite a while, I
changed two things:
- moved the VM from a 8-core 4GHz host to a slower 2-core 1.6 Ghz machine
- upgraded qemu from 2.1 to 2.5
and almost immediately (in a couple hours) got hit with a vhost-related
lockup.
QEMU command line is:
qemu-system-x86_64 -enable-kvm -daemonize -monitor
unix:./monitor,server,nowait -cpu host -M q35 -balloon virtio -device
virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd -drive
if=none,id=hd,cache=writeback,aio=native,format=raw,file=xxxx.img,discard=unmap
,detect-zeroes=unmap -device virtio-net-pci,netdev=net0,mac=xxxx -netdev
tap,vhost=on,id=net0,script=xxxx.sh -usbdevice tablet -smp 2 -m 512 -vnc
xxxx:yz
VM was running fine, except no network traffic was passed from/to it.
Shutting down the VM, it hung at "Will now halt." The QEMU process was
unkillable, so the only choice was to sysrq-b the entire box.
dmesg with sysrq-w attached.
** Affects: qemu
Importance: Undecided
Status: New
** Attachment added: "dmesg with sysrq-w"
https://bugs.launchpad.net/bugs/1626596/+attachment/4746283/+files/vhost.txt
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https://bugs.launchpad.net/bugs/1626596
Title:
Lockup with vhost network
Status in QEMU:
New
Bug description:
After using Qemu in this configuration successfully for quite a while, I
changed two things:
- moved the VM from a 8-core 4GHz host to a slower 2-core 1.6 Ghz machine
- upgraded qemu from 2.1 to 2.5
and almost immediately (in a couple hours) got hit with a vhost-
related lockup.
QEMU command line is:
qemu-system-x86_64 -enable-kvm -daemonize -monitor
unix:./monitor,server,nowait -cpu host -M q35 -balloon virtio -device
virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd -drive
if=none,id=hd,cache=writeback,aio=native,format=raw,file=xxxx.img,discard=unmap
,detect-zeroes=unmap -device virtio-net-pci,netdev=net0,mac=xxxx
-netdev tap,vhost=on,id=net0,script=xxxx.sh -usbdevice tablet -smp 2
-m 512 -vnc xxxx:yz
VM was running fine, except no network traffic was passed from/to it.
Shutting down the VM, it hung at "Will now halt." The QEMU process was
unkillable, so the only choice was to sysrq-b the entire box.
dmesg with sysrq-w attached.
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1626596/+subscriptions
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