Index: user/pho/stress2/misc/kevent13.sh
===================================================================
--- user/pho/stress2/misc/kevent13.sh	(revision 344009)
+++ user/pho/stress2/misc/kevent13.sh	(revision 344010)
@@ -1,134 +1,140 @@
 #!/bin/sh
 
 #
 # SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 #
 # Copyright (c) 2018 Dell EMC Isilon
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 #
 # $FreeBSD$
 #
 
 # Test based on scenario by Babcia Padlina
 
 # "panic: mutex pipe mutex not owned at sys_pipe.c:1769" seen:
 # https://people.freebsd.org/~pho/stress/log/kevent13.txt
 
 . ../default.cfg
 
 odir=`pwd`
 cd /tmp
 sed '1,/^EOF/d' < $odir/$0 > kevent13.c
 cc -o kevent13 -Wall kevent13.c -lpthread
 rm -f kevent13.c
 
+daemon sh -c "(cd $odir/../testcases/swap; ./swap -t 5m -i 20 -h -l 100)" > \
+    /dev/null
 [ -d "$RUNDIR" ] || mkdir -p $RUNDIR
 cd $RUNDIR
-for i in `jot 10`; do
-	/tmp/kevent13 &
-	/tmp/kevent13 &
-	wait
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 300 ]; do
+	for i in `jot 10`; do
+		/tmp/kevent13 &
+		/tmp/kevent13 &
+		wait
+	done
 done
+while pgrep -q swap; do pkill -9 swap; done
 
 rm -f /tmp/kevent13
 exit 0
 EOF
 /*
  * 29.08.2009, babcia padlina
  */
 
 #include <sys/types.h>
 #include <sys/event.h>
 #include <sys/param.h>
 #include <sys/timespec.h>
 #include <unistd.h>
 
 #include <err.h>
 #include <fcntl.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
 #define LOOPS 200000
 
 struct kevent kev, ke[2];
 struct timespec timeout;
 volatile int go;
 int fd[2], kq;
 
 void
 do_thread(void) {
 	int i;
 
 	go = 1;
 	for (i = 0; i < LOOPS; i++) {
 		if (pipe(fd) < 0)
 			err(1, "pipe");
 		memset(&kev, 0, sizeof(kev));
 		EV_SET(&kev, fd[0], EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, NULL);
 		EV_SET(&kev, fd[1], EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, NULL);
 
 		if (kevent(kq, &kev, 2, &ke[0], 2, &timeout) < 0)
 			err(1, "kevent");
 
 		close(fd[0]);
 		close(fd[1]);
 	}
 }
 
 void
 do_thread2(void) {
 	int i;
 
 	while (go == 0)
 		usleep(10);
 	for (i = 0; i < LOOPS; i++) {
 		close(fd[0]);
 		close(fd[1]);
 	}
 }
 
 int
 main(void) {
 	pthread_t pth, pth2;
 	int r;
 
 	if ((kq = kqueue()) < 0)
 		err(1, "kqueue");
 
 	if ((r = pthread_create(&pth, NULL, (void *)do_thread, NULL)) != 0)
 		errc(1, r, "pthread_create");
 	if ((r = pthread_create(&pth2, NULL, (void *)do_thread2, NULL)) != 0)
 		errc(1, r, "pthread_create");
 
 	timeout.tv_sec = 0;
 	timeout.tv_nsec = 1;
 
 	if ((r = pthread_join(pth, NULL)) != 0)
 		errc(1, r, "pthread_join");
 	if ((r = pthread_join(pth2, NULL)) != 0)
 		errc(1, r, "pthread_join");
 
 	return (0);
 }