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Diffstat (limited to 'results/scraper/launchpad-without-comments/1546445')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1546445 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1546445 b/results/scraper/launchpad-without-comments/1546445 new file mode 100644 index 00000000..2d1d6b5b --- /dev/null +++ b/results/scraper/launchpad-without-comments/1546445 @@ -0,0 +1,21 @@ +support vhost user without specifying vhostforce + +[Impact] + + * 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. + +[Test Case] + + create a vhost-user virtio backend without specifying the vhostforce option, i.e. -netdev type=vhost-user,id=mynet1,chardev=<char_dev_for_the_controll_channel> + start the VM + vhost-user is not enabled + +[Regression Potential] + + * none + +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 should +enable it for non msi guests. + +The problem has been fix in qemu upstream - http://git.qemu.org/?p=qemu.git;a=commitdiff;h=24f938a682d934b133863eb421aac33592f7a09e. And the patch needs to be backported to 1:2.2+dfsg-5expubuntu9.8 . \ No newline at end of file |