[RFC PATCH 0/1] netlink: Netlink process event for cgroup migration

[Prakash Sangappa]

With cgroup based resource management, it becomes useful for
userspace to be notified when a task changes cgroup membership.
Unexpected migrations can lead to incorrect resource accounting
and enforcement resulting in undesirable behavior or failures.
Applications/userspace have to poll /proc to detect changes to 
cgroup membership, which is inefficient when dealing with a large
number of tasks.

Add a new netlink proc connector event that gets generated when
a task migrates between cgroups. This allows applications/tools
to monitor cgroup membership changes without periodic polling. 

The netlink proc event will include task's pid/tgid, initiator
process pid/tgid and the cgroup id.  

Prakash Sangappa (1):
  netlink: Add Netlink process event for cgroup migration

 drivers/connector/cn_proc.c  | 28 ++++++++++++++++++++++++++++
 include/linux/cn_proc.h      |  3 +++
 include/uapi/linux/cn_proc.h | 14 ++++++++++++--
 kernel/cgroup/cgroup-v1.c    |  7 ++++++-
 kernel/cgroup/cgroup.c       |  5 ++++-
 5 files changed, 53 insertions(+), 4 deletions(-)

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2.43.7