> > > If an application creates its cq for DIRECT poll mode using ib_create_cq() > > instead of ib_alloc_cq(), and then uses ib_drain_qp() to drain its qp, > > ib_drain_sq/rq() will always hang forever because cq->wc is NULL. IE > > ib_create_cq() doesn't allocate cq->wc, and ib_alloc_cq() does. Yet the > > __ib_process_cq() requires cq->wc to actually complete any completions > and > > calling the cqe_done function. > > > > Is this a bug in the CQ core code or the application? > > Take a look in __ib_drain_rq/__ib_drain_sq for > cq->poll_ctx == IB_POLL_DIRECT. The drain routine polls > the completion queue from time to time... Yes, but it ends up calling __ib_process_cq() which doesn't actually poll the CQ because cq->wc is NULL. Steve. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
