cgroups: document the effect of attaching PID 0 to a cgroup
authorLi Zefan <lizf@cn.fujitsu.com>
Fri, 4 Jul 2008 16:59:55 +0000 (09:59 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 4 Jul 2008 17:40:08 +0000 (10:40 -0700)
Document that a pid of zero(0) can be used to refer to the current task
when attaching a task to a cgroup, as in the following usage:

# echo 0 > /dev/cgroup/tasks

This is consistent with existing cpuset behavior.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Jackson <pj@sgi.com>
Acked-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Andrea Righi <righi.andrea@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/cgroups.txt

index 824fc02744719ecb02b29177c11c55034229af35..d9014aa0eb68b469836b29afe932532b168a63ee 100644 (file)
@@ -390,6 +390,10 @@ If you have several tasks to attach, you have to do it one after another:
        ...
 # /bin/echo PIDn > tasks
 
+You can attach the current shell task by echoing 0:
+
+# echo 0 > tasks
+
 3. Kernel API
 =============