On Thu, Dec 29, 2011 at 4:42 PM, Flavio Baronti <f.baro...@list-group.com> wrote: > I'm new to RDMA development and I have a question regarding resource release. > If I understood correctly, when ibv_get_cq_event returns, it holds some sort > of lock over the completion queue, which is released when I call > ibv_req_notify_cq. This lock is checked also in ibv_destroy_cq, so that: > 1) When ibv_destroy_cq returns, I am certain that there is no thread running > somewhere between ibv_get_cq_event and ibv_req_notify_cq > 2) When ibv_destroy_cq returns, I am certain that ibv_get_cq_event will not > return the destroyed cq any more.
There is a paragraph in the IBTA that warns that the above sequence can cause WQE and data segment leakage in the HCA for QPs associated with an SRQ. I don't know though whether this can also occur for QPs with a private receive queue - I'm not a HCA firmware expert. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
