Sean Mooney c7eb823fe7 stop setting mtu when plugging vhost-user ports ... vhost-user is a userspace protocol to establish connectivity between a virto-net frontend typically qemu and a userspace virtio backend such as ovs with dpdk. vhost-user interfaces exist only in userspace from the host perspective and are not represented in the linux networking stack as kernel netdevs. As a result attempting to set the mtu on a vhost-user interface using ifconfig or ip link will fail with a device not found error. - this change removes a call to _set_device_mtu when plugging vhost-user interfaces. - this change prevents the device not found error from occurring which stopped vms booting with vhost-user interfaces due to an uncaught exception resulting in a failure to set the interface type in ovs. - this change make creating vhost-user interface an atomic action. This latent bug is only triggered when the mtu value is set to a value other than 0 which was the default proir to mitaka. Change-Id: I2e17723d5052d57cd1557bd8a173c06ea0dcb2d4 Closes-Bug: #1533876 (cherry picked from commit adf7ba61dd)		2016-03-22 11:54:12 -04:00
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notes	stop setting mtu when plugging vhost-user ports	2016-03-22 11:54:12 -04:00
source	Add "unreleased" release notes page	2015-11-12 17:34:54 +01:00