--- libaitsched/src/hooks.c	2014/01/28 10:07:06	1.24.4.3
+++ libaitsched/src/hooks.c	2014/01/28 10:08:18	1.24.4.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: hooks.c,v 1.24.4.3 2014/01/28 10:07:06 misho Exp $
+* $Id: hooks.c,v 1.24.4.4 2014/01/28 10:08:18 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -1231,6 +1231,13 @@ sched_hook_fetch(void *root, void *arg __unused)
 				FD_CLR(i, &r->root_fds[1]);
 		}
 	}
+
+	/* optimize select */
+	for (i = r->root_kq - 1; i > 2; i--)
+		if (FD_ISSET(i, &r->root_fds[0]) || FD_ISSET(i, &r->root_fds[1]))
+			break;
+	if (i > 2)
+		r->root_kq = i + 1;
 #endif	/* KQ_DISABLE */
 
 skip_event: