rdma engine graceful teardown
For rdma ioengine's one side operation, RDMA_WRITE or RDMA_READ,
server side gets a message from client side that the task is finished.
In previous version, the server simply exit() in td_io_commit() which
causes segmentation fault in thread mode or process hanging in process
mode. This patch achieves graceful tear down by setting up `td->done`
as UDP engine did.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/ioengines.c b/ioengines.c
index 1a0898d..bb7833f 100644
--- a/ioengines.c
+++ b/ioengines.c
@@ -208,6 +208,16 @@
{
int r = 0;
+ /*
+ * For ioengine=rdma one side operation RDMA_WRITE or RDMA_READ,
+ * server side gets a message from the client
+ * side that the task is finished, and
+ * td->done is set to 1 after td_io_commit(). In this case,
+ * there is no need to reap complete event in server side.
+ */
+ if (td->done)
+ return 0;
+
if (min > 0 && td->io_ops->commit) {
r = td->io_ops->commit(td);
if (r < 0)