From: Cedric Le Goater Date: Fri, 23 May 2008 20:05:02 +0000 (-0700) Subject: cgroups: remove node_ prefix_from ns subsystem X-Git-Tag: v2.6.26-rc4~14 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5c02b575780d0d785815a1e7b79a98edddee895a;p=linux-2.6 cgroups: remove node_ prefix_from ns subsystem This is a slight change in the namespace cgroup subsystem api. The change is that previously when cgroup_clone() was called (currently only from the unshare path in ns_proxy cgroup, you'd get a new group named "node_$pid" whereas now you'll get a group named after just your pid.) The only users who would notice it are those who are using the ns_proxy cgroup subsystem to auto-create cgroups when namespaces are unshared - something of an experimental feature, which I think really needs more complete container/namespace support in order to be useful. I suspect the only users are Cedric and Serge, or maybe a few others on containers@lists.linux-foundation.org. And in fact it would only be noticed by the users who make the assumption about how the name is generated, rather than getting it from the /proc//cgroups file for the process in question. Whether the change is actually needed or not I'm fairly agnostic on, but I guess it is more elegant to just use the pid as the new group name rather than adding a fairly arbitrary "node_" prefix on the front. [menage@google.com: provided changelog] Signed-off-by: Cedric Le Goater Cc: "Paul Menage" Cc: "Serge E. Hallyn" Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/kernel/cgroup.c b/kernel/cgroup.c index fbc6fc8949..15ac0e1e4f 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -2903,7 +2903,7 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys) cg = tsk->cgroups; parent = task_cgroup(tsk, subsys->subsys_id); - snprintf(nodename, MAX_CGROUP_TYPE_NAMELEN, "node_%d", tsk->pid); + snprintf(nodename, MAX_CGROUP_TYPE_NAMELEN, "%d", tsk->pid); /* Pin the hierarchy */ atomic_inc(&parent->root->sb->s_active);