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[Qemu-devel] [Bug 1546445] Re: support vhost user without specifying vho
[Qemu-devel] [Bug 1546445] Re: support vhost user without specifying vhostforce
Wed, 09 Nov 2016 12:18:41 -0000
** Tags removed: sts-sru
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support vhost user without specifying vhostforce
Status in Ubuntu Cloud Archive:
Status in Ubuntu Cloud Archive kilo series:
Status in QEMU:
Status in qemu package in Ubuntu:
Status in qemu source package in Wily:
* vhost-user falls back to virtio-net which causes performance lose
without specifying the vhostforce option. But it should be the default
behavior for vhost-user, since guests using PMD doesn't support msi-x.
create a vhost-user virtio backend without specifying the vhostforce
option, i.e. -netdev
start the VM
vhost-user is not enabled
vhost user nic doesn't support non msi guests(like pxe stage) by default.
Vhost user nic can't fall back to qemu like normal vhost net nic does. So we
enable it for non msi guests.
The problem has been fix in qemu upstream -
And the patch needs to be backported to 1:2.2+dfsg-5expubuntu9.8 .
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Louis Bouchard <=