[ovs-dev] [PATCH V5 2/5] dpif-netdev: Implement the API functions to allow multiple handler threads read upcall.

[Ben Pfaff]

On Wed, Mar 19, 2014 at 01:35:04PM -0700, Alex Wang wrote:
> This commit implements the API functions to allow multiple handler
> threads read upcall.
> 
> Also, this commit removes the handling priority of DPIF_UC_MISS
> over DPIF_UC_ACTION.  So, both misses will be put to the same
> queue.  The decision is based on the fact that a lot has changed
> since the age when flow setup rate is most treasured and starving
> all actions in the presence of any flow misses doesn't seem like
> a sound balancing solution.
> 
> Thusly the current implementation will be put in testing and
> investigation for better balancing solution will continue if
> there is an issue.
> 
> Also note, the introduction and use of flow_hash_5tuple() will
> put missed ICMP packets from same source but with different
> type/code to different handler queues.  This may cause reordering
> of these packets.  For now, we do not count this as a problem.
> 
> Signed-off-by: Alex Wang <alexw at nicira.com>

Alex, Pravin is also changing dpif-netdev, to add DPDK support.
Please coordinate with him to figure out who should make changes first
and to make sure that your changes don't conflict with each other.

Acked-by: Ben Pfaff <blp at nicira.com>