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Fix issue with mountCgroups not recognizing mounted cgroup

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Changed mountCgroups to use the file /proc/mounts (instead of the
current case where it uses the less reliable
(http://www.mail-archive.com/lxc-devel@lists.sourceforge.net/msg00455.html)
/etc/mtab thorugh the mount program
This commit is contained in:
Piyush Srivastava
2013-07-13 13:31:05 -07:00
parent c188bee3e3
commit 433ca2ecb6
1 changed files with 4 additions and 4 deletions
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mininet/util.py
+4 -4
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@@ -363,13 +363,13 @@ def fixLimits():
def mountCgroups():
"Make sure cgroups file system is mounted"
mounts = quietRun( 'mount' )
mounts = quietRun( 'cat /proc/mounts' )
cgdir = '/sys/fs/cgroup'
csdir = cgdir + '/cpuset'
if ('cgroup on %s' % cgdir not in mounts and
'cgroups on %s' % cgdir not in mounts):
if ('cgroup %s' % cgdir not in mounts and
'cgroups %s' % cgdir not in mounts):
raise Exception( "cgroups not mounted on " + cgdir )
if 'cpuset on %s' % csdir not in mounts:
if 'cpuset %s' % csdir not in mounts:
errRun( 'mkdir -p ' + csdir )
errRun( 'mount -t cgroup -ocpuset cpuset ' + csdir )