From: Stephen Hemminger <stephen@networkplumber.org>
To: roy.qing.li@gmail.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH][net-next][v2] bridge: allow the maximum mtu to 64k
Date: Wed, 24 Feb 2016 13:44:56 -0800 [thread overview]
Message-ID: <20160224134456.3ea94f0a@xeon-e3> (raw)
In-Reply-To: <1456189256-7811-1-git-send-email-roy.qing.li@gmail.com>
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.
next prev parent reply other threads:[~2016-02-24 21:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 1:00 [PATCH][net-next][v2] bridge: allow the maximum mtu to 64k roy.qing.li
2016-02-24 20:57 ` David Miller
2016-02-24 21:44 ` Stephen Hemminger [this message]
2016-02-25 1:50 ` Li RongQing
2016-02-25 19:28 ` David Miller
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