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a77aea9201
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 45531757b4 ("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 <daniel.lezcano@free.fr>
Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Jamal Hadi Salim <hadi@cyberus.ca>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Acked-by: Matt Helsley <matthltc@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
66 lines
748 B
C
66 lines
748 B
C
/* Add subsystem definitions of the form SUBSYS(<name>) in this
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* file. Surround each one by a line of comment markers so that
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* patches don't collide
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*/
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/* */
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/* */
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#ifdef CONFIG_CPUSETS
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SUBSYS(cpuset)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_DEBUG
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SUBSYS(debug)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_SCHED
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SUBSYS(cpu_cgroup)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_CPUACCT
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SUBSYS(cpuacct)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_MEM_RES_CTLR
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SUBSYS(mem_cgroup)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_DEVICE
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SUBSYS(devices)
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#endif
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/* */
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#ifdef CONFIG_CGROUP_FREEZER
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SUBSYS(freezer)
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#endif
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/* */
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#ifdef CONFIG_NET_CLS_CGROUP
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SUBSYS(net_cls)
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#endif
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/* */
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#ifdef CONFIG_BLK_CGROUP
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SUBSYS(blkio)
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#endif
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#ifdef CONFIG_CGROUP_PERF
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SUBSYS(perf)
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#endif
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/* */
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