server: fix wrong use of exit() in server when daemonized

We can't use exit(), or we'll trigger the atexit() hook and
free the shared mem used for mutexes, etc. This can cause a
hang when using a daemonized fio server.

Reported-by: Castor Fu <castor@egocast.org>
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/server.c b/server.c
index e2a6f73eb2ba4678d971b668f0d1cb3d5d14e35c..36713ee5716058fddf49f7213fe6d444b26b7c53 100644 (file)
--- a/server.c
+++ b/server.c
@@ -1709,7 +1709,7 @@ int fio_start_server(char *pidfile)
                int ret = write_pid(pid, pidfile);
 
                free(pidfile);
-               exit(ret);
+               _exit(ret);
        }
 
        setsid();