Re: [GIT PULL v2] Open vSwitch

Le mercredi 23 novembre 2011 à 07:47 -0500, jamal a écrit :

On Wed, 2011-11-23 at 09:12 +0100, Eric Dumazet wrote:

quoted

I had no time to look at OVS, but current tc model is not scalable,
everything is performed under a queue lock.
Maybe its time to redesign a new model, based on modern techniques.

Making the enqueur/dequeuer lockless would be a big win. What happened
to your idea of ring buffer?

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

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

 (1) rcu'ify classifiers/actions as needed
 (2) add flag to drop qdisc lock on simple or hw qdiscs
 (3) mq and mqprio call root qdisc and run a pass over classifiers
     actions possibly resetting queue_mapping.



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