[ofa-general] [PATCH RFC v3 1/2] RDMA/Core: MEM_MGT_EXTENSIONS support

[Roland Dreier]

 > * Do we want it to be a must for a consumer to invalidate an fast-reg
 > mr before reusing it? if yes, how?

The verbs specs go into exhaustive detail about the state diagram for
validity of MRs.

 > * talking about remote invalidation, I understand that it requires
 > support of both sides (and hence has to be negotiated), so the
 > IB_DEVICE_SEND_W_INV device capability says that a device can
 > send-with-invalidate, do we need a IB_DEVICE_RECV_W_INV cap as well?

I think we decided that all of these related features will be indicated
by IB_DEVICE_MEM_MGT_EXTENSIONS to avoid an explosion of capability bits.

 > * what about ZBVA, is it orthogonal to these calls, no enhancement of
 > the suggested API is needed even if zbva is used, or the other way, it
 > would work also when zbva is not used?

ZBVA would require adding some flag to request ZBVA when registering.

 - R.