[openib-general] [PATCH 0/4] Dispatch communication related events to the IB CM

[Sean Hefty]

Michael S. Tsirkin wrote:
> Neither am I, but still I'm a bit uncomfortable - after all,
> the spec explicitly says:
> 
> "it should be pointed out that successful reception of the final message
> in a CM protocol message exchange cannot be guaranteed."

The patch handles this by routing the communication establish event directly to 
the IB CM for processing, which will force the connection in the established 
state and generate a connection event to the user.

The requirement for RDMA CM users is that they must wait for an 
RDMA_CM_EVENT_ESTABLISHED event before posting sends.  Are we happy with this 
requirement?

The effect on the user is that either the receive processing must be deferred or 
sends must be queued until such an event occurs.  The alternative is to add an 
rdma_establish() call that a user may call after polling their first receive 
completion.

- Sean