From a77aea92010acf54ad785047234418d5d68772e2 Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Thu, 26 May 2011 16:25:23 -0700 Subject: cgroup: remove the ns_cgroup The ns_cgroup is an annoying cgroup at the namespace / cgroup frontier and leads to some problems: * cgroup creation is out-of-control * cgroup name can conflict when pids are looping * it is not possible to have a single process handling a lot of namespaces without falling in a exponential creation time * we may want to create a namespace without creating a cgroup The ns_cgroup was replaced by a compatibility flag 'clone_children', where a newly created cgroup will copy the parent cgroup values. The userspace has to manually create a cgroup and add a task to the 'tasks' file. This patch removes the ns_cgroup as suggested in the following thread: https://lists.linux-foundation.org/pipermail/containers/2009-June/018616.html The 'cgroup_clone' function is removed because it is no longer used. This is a userspace-visible change. Commit 45531757b45c ("cgroup: notify ns_cgroup deprecated") (merged into 2.6.27) caused the kernel to emit a printk warning users that the feature is planned for removal. Since that time we have heard from XXX users who were affected by this. Signed-off-by: Daniel Lezcano Signed-off-by: Serge E. Hallyn Cc: Eric W. Biederman Cc: Jamal Hadi Salim Reviewed-by: Li Zefan Acked-by: Paul Menage Acked-by: Matt Helsley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- init/Kconfig | 8 -------- 1 file changed, 8 deletions(-) (limited to 'init/Kconfig') diff --git a/init/Kconfig b/init/Kconfig index 332aac649966..ebafac4231ee 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -589,14 +589,6 @@ config CGROUP_DEBUG Say N if unsure. -config CGROUP_NS - bool "Namespace cgroup subsystem" - help - Provides a simple namespace cgroup subsystem to - provide hierarchical naming of sets of namespaces, - for instance virtual servers and checkpoint/restart - jobs. - config CGROUP_FREEZER bool "Freezer cgroup subsystem" help -- cgit v1.2.3-59-g8ed1b