Re: [GIT PULL v2] Open vSwitch

On Wed, 2011-11-23 at 13:55 +0100, Eric Dumazet wrote:

Currently thinking about it. I was also waiting Tom Herbert BQL patches.

Excellent. I can test when you have something.

Several people are interested, and John Fastabend told me he plans to :

 (1) rcu'ify classifiers/actions as needed

Makes sense in most cases. If you have a lot of flow setup/teardown
it may harm.
Another one - but dont see how much you can do about this; useful
when you want to share state (eg multiple flows being policed
by a single rate meter);
An action could be shared across multiple policies i.e you can
have:
match1, action foo instance 1, action bar instance 3
match2, action bar instance3
match3, ....
This could would mean a lock contended across cpus when different
flows hitting match1/2 show up on different cpus.
 

 (2) add flag to drop qdisc lock on simple or hw qdiscs

Where does config for the hardware happen from?

 (3) mq and mqprio call root qdisc and run a pass over classifiers
     actions possibly resetting queue_mapping.

It seems to make sense - but I will wait and see to have better
understanding.

cheers,
jamal