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authorPaul Menage <menage@google.com>2008-04-10 21:29:16 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-11 08:06:43 -0700
commitb6c3006d204a0b86e1ebe02ca38f9f071a03c7ef (patch)
treef8f4487b8fe5dedb804c876c3e6f7df90f6b209d
parentd10d89ec78114f925f63c5126a2b2490f501a462 (diff)
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>
-rw-r--r--kernel/cgroup.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 62f1a5231fe9..2727f9238359 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -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, ':');