Thanks Roland to clarify our confusion. So looks ping-pong mechanism is the way to go.
Regards, Jack 2014-10-23 20:43 GMT+02:00 Roland Dreier <[email protected]>: > On Thu, Oct 23, 2014 at 6:50 AM, Jack Wang <[email protected]> wrote: >>> I expected that RDMA-Write operations will fail if the other crashes. >>> Also I hoped that an event is generated when a host is crashed. The subnet >>> manager should notice it and notify every other device in the network. >>> >>> Are we missing something in our modules? >>> Is there a way to determine that a RC peer crashed without implementing a >>> ping-pong mechanism? > > If the remote system crashes then any memory regions, QPs, etc. are > still valid with the remote HCA, and RDMA read/write operations will > continue to succeed. (Unless the system reboots and reinitializes the > adapter or something like that). > > There isn't a way to detect a remote crash unless that remote crash > disconnects your QP or otherwise affects the HCA on the crashed > system. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
