From 3a0ef258d11cb3279accf98c1c64c204ae98c35f Mon Sep 17 00:00:00 2001
From: Bob Lantz <rlantz@cs.stanford.edu>
Date: Thu, 12 Jul 2018 19:16:08 +0000
Subject: [PATCH] grep cgroup /proc/mounts in mountCgroup

---
 mininet/util.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mininet/util.py b/mininet/util.py
index 2fcacde..ae552f4 100644
--- a/mininet/util.py
+++ b/mininet/util.py
@@ -495,7 +495,7 @@ def fixLimits():
 
 def mountCgroups():
     "Make sure cgroups file system is mounted"
-    mounts = quietRun( 'cat /proc/mounts' )
+    mounts = quietRun( 'grep cgroup /proc/mounts' )
     cgdir = '/sys/fs/cgroup'
     csdir = cgdir + '/cpuset'
     if ('cgroup %s' % cgdir not in mounts and