Re: [PATCH -next 2/2] virtio_net: Read the advised MTU

On 06/02/2016 10:06 AM, Aaron Conole wrote:

Rick Jones [off-list ref] writes:

quoted

One of the things I've been doing has been setting-up a cluster
(OpenStack) with JumboFrames, and then setting MTUs on instance vNICs
by hand to measure different MTU sizes.  It would be a shame if such a
thing were not possible in the future.  Keeping a warning if shrinking
the MTU would be good, leave the error (perhaps) to if an attempt is
made to go beyond the advised value.

This was cut because it didn't make sense for such a warning to
be issued, but it seems like perhaps you may want such a feature?  I
agree with Michael, after thinking about it, that I don't know what sort
of use the warning would serve.  After all, if you're changing the MTU,
you must have wanted such a change to occur?

I don't need a warning, was simply willing to live with one when 
shrinking the MTU.  Didn't want an error.

happy benchmarking,

rick jones