nvmet-rdma: occasionally flush ongoing controller teardown
If we are attacked with establishments/teradowns we need to
make sure we do not consume too much system memory. Thus
let ongoing controller teardowns complete before accepting
new controller establishments.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
index ecc4fe8..88bb581 100644
--- a/drivers/nvme/target/rdma.c
+++ b/drivers/nvme/target/rdma.c
@@ -1199,6 +1199,11 @@
}
queue->port = cm_id->context;
+ if (queue->host_qid == 0) {
+ /* Let inflight controller teardown complete */
+ flush_scheduled_work();
+ }
+
ret = nvmet_rdma_cm_accept(cm_id, queue, &event->param.conn);
if (ret)
goto release_queue;