[PATCH cgroups] Remove deprecated subsystem from examples.

[Trevor Woerner <twoerner@gmail.com>]

From: Trevor Woerner <twoerner@gmail.com>

The 'ns' cgroup is considered deprecated. Change the cgroup subsystem
used in the examples of the cgroup documentation from 'ns' to 'blkio'.

Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Trevor Woerner <twoerner@gmail.com>
---
 Documentation/cgroups/cgroups.txt |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Documentation/cgroups/cgroups.txt b/Documentation/cgroups/cgroups.txt
index 190018b..44b8b7a 100644
--- a/Documentation/cgroups/cgroups.txt
+++ b/Documentation/cgroups/cgroups.txt
@@ -355,13 +355,13 @@ subsystems, type:
 
 To change the set of subsystems bound to a mounted hierarchy, just
 remount with different options:
-# mount -o remount,cpuset,ns hier1 /dev/cgroup
+# mount -o remount,cpuset,blkio hier1 /dev/cgroup
 
-Now memory is removed from the hierarchy and ns is added.
+Now memory is removed from the hierarchy and blkio is added.
 
-Note this will add ns to the hierarchy but won't remove memory or
+Note this will add blkio to the hierarchy but won't remove memory or
 cpuset, because the new options are appended to the old ones:
-# mount -o remount,ns /dev/cgroup
+# mount -o remount,blkio /dev/cgroup
 
 To Specify a hierarchy's release_agent:
 # mount -t cgroup -o cpuset,release_agent="/sbin/cpuset_release_agent" \
-- 
1.7.1