Commit b6c3006d authored Apr 10, 2008 by Paul Menage Committed by Linus Torvalds Apr 11, 2008

cgroups: include hierarchy ids in /proc/<pid>/cgroup



Extend the /proc/<pid>/cgroup file to include the appropriate hierarchy ID on
each line.

Currently this ID isn't really needed since a hierarchy can be completely
identified by the set of subsystems bound to it, but this is likely to change
in the near future in order to support stateless subsystems and
merging/rebinding of subsystems.  Getting this change into 2.6.25 reduces the
need for an API change later.

Signed-off-by: Paul Menage <menage@google.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d10d89ec

kernel/cgroup.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -2569,6 +2569,7 @@ static int proc_cgroup_show(struct seq_file m, void v)
		/* Skip this hierarchy if it has no active subsystems */
		if (!root->actual_subsys_bits)
		continue;
		seq_printf(m, "%lu:", root->subsys_bits);
		for_each_subsys(root, ss)
		seq_printf(m, "%s%s", count++ ? "," : "", ss->name);
		seq_putc(m, ':');

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