Re: [PATCH][net-next][v2] bridge: allow the maximum mtu to 64k
flat view
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2016-02-24 21:44:48
On Tue, 23 Feb 2016 09:00:56 +0800 roy.qing.li@gmail.com wrote:
This is especially annoying for the virtualization case because the KVM's tap driver will by default adopt the bridge's MTU on startup making it impossible (without the workaround) to use a large MTU on the guest VMs. https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1399064
This use case looks like KVM misusing bridge MTU. I.e it should set TAP MTU to what it wants then enslave it, not vice versa.