[RFC 0/2] cgroup: New misc cgroup controller

[Vipin Sharma]

Hello,

This patch is creating a new misc cgroup controller for allocation and
tracking of resources which are not abstract like other cgroup
controllers.

This controller was initially proposed as encryption_id but after
the feedbacks, it is now changed to misc cgroup.
https://lore.kernel.org/lkml/20210108012846.4134815-2-vipinsh@xxxxxxxxxx/

Changes from the encryption_id controller are:
1. There are only 3 files misc.{capacity, max, current} for all
   resources compared to each resource having their own 3 files in
   encryption_id cgroup.
2. If a resource capacity is 0 then it is considered inactive and won't
   show up in control files.
2. This is a lockless implementation similar to page counter APIs
   compared to single lock implementation in encryption_id cgroup.

Please provide any feedback for this RFC or if it is good for
merging then I can send a patch for merging.

Thanks

Vipin Sharma (2):
  cgroup: sev: Add misc cgroup controller
  cgroup: sev: Miscellaneous cgroup documentation.

 Documentation/admin-guide/cgroup-v1/misc.rst |   1 +
 Documentation/admin-guide/cgroup-v2.rst      |  64 ++-
 arch/x86/kvm/svm/sev.c                       |  60 ++-
 arch/x86/kvm/svm/svm.h                       |   1 +
 include/linux/cgroup_subsys.h                |   4 +
 include/linux/misc_cgroup.h                  |  75 +++
 init/Kconfig                                 |  14 +
 kernel/cgroup/Makefile                       |   1 +
 kernel/cgroup/misc.c                         | 456 +++++++++++++++++++
 9 files changed, 664 insertions(+), 12 deletions(-)
 create mode 100644 Documentation/admin-guide/cgroup-v1/misc.rst
 create mode 100644 include/linux/misc_cgroup.h
 create mode 100644 kernel/cgroup/misc.c

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2.30.0.617.g56c4b15f3c-goog