Remove the explicit call_rcu thread creating and destruction

The free_all_cpu_call_rcu_data() call can consume hundreds of
milliseconds on shutdown.  Don't try to be smart and let the RCU library
handle this internally.

diff --git a/lib/isc/loop.c b/lib/isc/loop.c
index f9ebc49fe23b67c613005904a49e3baa8e000564..67f74c4571d38f8693525832a53363edac74646f 100644 (file)
--- a/lib/isc/loop.c
+++ b/lib/isc/loop.c
@@ -434,8 +434,6 @@ isc_loopmgr_run(isc_loopmgr_t *loopmgr) {
         */
        ignore_signal(SIGPIPE, SIG_IGN);
 
-       bool free_call_rcu_data = !create_all_cpu_call_rcu_data(0);
-
        /*
         * The thread 0 is this one.
         */
@@ -450,12 +448,6 @@ isc_loopmgr_run(isc_loopmgr_t *loopmgr) {
        }
 
        isc_thread_main(loop_thread, &loopmgr->loops[0]);
-
-       rcu_barrier();
-
-       if (free_call_rcu_data) {
-               free_all_cpu_call_rcu_data();
-       }
 }
 
 void