svm: add support for eventfd signaling to queue

Support the use of eventfds to signal queue updates between consumer
and producer pairs.

Change-Id: Idb6133be2b731fff78ed520daf9d2e0399642aab
Signed-off-by: Florin Coras <fcoras@cisco.com>
diff --git a/src/svm/test_svm_message_queue.c b/src/svm/test_svm_message_queue.c
index 758163f..9441c59 100644
--- a/src/svm/test_svm_message_queue.c
+++ b/src/svm/test_svm_message_queue.c
@@ -169,6 +169,7 @@
   unformat_input_t i;
   int r;
 
+  clib_mem_init_thread_safe (0, 256 << 20);
   unformat_init_command_line (&i, argv);
   r = test_svm_message_queue (&i);
   unformat_free (&i);