ovs-ctl: Restore ability to create 256 bridges.

OVS is supposed to support at least 256 bridges simultaneously, but the
file descriptor count was a little too low for that.

Build tested only.

Bug #8218.
Reported-by: Luca Giraudo <lgiraudo@nicira.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/utilities/ovs-ctl.in b/utilities/ovs-ctl.in
index ee6035c..dff5f84 100755 (executable)
--- a/utilities/ovs-ctl.in
+++ b/utilities/ovs-ctl.in
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2009, 2010, 2011 Nicira Networks, Inc.
+# Copyright (C) 2009, 2010, 2011, 2012 Nicira Networks, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -199,9 +199,10 @@ start () {
     if daemon_is_running ovs-vswitchd; then
        log_success_msg "ovs-vswitchd is already running"
     else
-       # Increase the limit on the number of open file descriptors since
-       # ovs-vswitchd needs a few per bridge
-       ulimit -n 4096
+       # Increase the limit on the number of open file descriptors.
+       # ovs-vswitchd needs 16 per datapath, plus a few extra, so this
+       # should allow for 256 (or more) bridges.
+       ulimit -n 5000
 
        # Start ovs-vswitchd.
        set ovs-vswitchd unix:"$DB_SOCK"