]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commit
cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups
authorGrzegorz Nosek <root@localdomain.pl>
Thu, 2 Apr 2009 23:57:23 +0000 (16:57 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 3 Apr 2009 02:04:53 +0000 (19:04 -0700)
commit313e924c0852943e67335fad9d2608701f0dfe8e
treefa4c3f65a7ed6edea52ae78b012138ebab1420c3
parentd20a390a0ee2bf2f692c539c6ce1c829e1080bb5
cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups

The ns_proxy cgroup allows moving processes to child cgroups only one
level deep at a time.  This commit relaxes this restriction and makes it
possible to attach tasks directly to grandchild cgroups, e.g.:

($pid is in the root cgroup)
echo $pid > /cgroup/CG1/CG2/tasks

Previously this operation would fail with -EPERM and would have to be
performed as two steps:
echo $pid > /cgroup/CG1/tasks
echo $pid > /cgroup/CG1/CG2/tasks

Also, the target cgroup no longer needs to be empty to move a task there.

Signed-off-by: Grzegorz Nosek <root@localdomain.pl>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/linux/cgroup.h
kernel/cgroup.c
kernel/ns_cgroup.c