From: Matthew Dillon <dillon@apollo.backplane.com>
Date: Wed, 8 Feb 2012 23:32:52 +0000 (-0800)
Subject: test - Adjust randread to not share file descriptors
X-Git-Tag: v3.4.0rc~1239
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/79580b6b91b2d2b38532aa3837ac35f22055f2ab

test - Adjust randread to not share file descriptors

* Close and reopen the device when randread fork()s so the physical
  file descriptor is not shared.  The vnode will still be shared.

* Works around a serialization issue when a file descriptor is shared.
---

diff --git a/test/sysperf/randread.c b/test/sysperf/randread.c
index f0ce61b519..57ddde1036 100644
--- a/test/sysperf/randread.c
+++ b/test/sysperf/randread.c
@@ -71,6 +71,8 @@ main(int ac, char **av)
 
     for (i = 0; i < nprocs; ++i) {
 	if (fork() == 0) {
+	    close(fd);
+	    fd = open(av[1], O_RDONLY);
 	    srandomdev();
 	    for (;;) {
 		long pos = (random() % limit) & ~(off_t)(bytes - 1);