[RFC 0/4] cgroup hierarchy controls and stats

From: Roman Gushchin
Date: Wed Aug 02 2017 - 14:40:30 EST

Date: Wed, 2 Aug 2017 17:55:28 +0100
From: Roman Gushchin <guro@xxxxxx>
To: cgroups@xxxxxxxxxxxxxxx
Cc: Roman Gushchin <guro@xxxxxx>
Subject: [RFC 0/4] cgroup hierarchy controls and stats
X-Mailer: git-send-email 2.13.3

Creating cgroup hierearchies of an unreasonable size can affect
system performance. A user might want to limit the size
of the cgroup hierarchy.

This patchset implements an ability to control and monitor cgroup
hierarchy size.

Patch 1 implements tracking of live and dying descendant cgroups
on each cgroup level.
Patch 2 adds cgroup.max.descendants and cgroup.max.depth interfaces
to set up hierarchy limits.
Patch 3 adds cgroup.stat interface with simple hierarchy stats.
Patch 4 is a trivial cleanup.

Roman Gushchin (4):
cgroup: keep track of number of descent cgroups
cgroup: implement hierarchy limits
cgroup: add cgroup.stat interface with basic hierarchy stats
cgroup: re-use the parent pointer in cgroup_destroy_locked()

Documentation/cgroup-v2.txt | 32 +++++++++
include/linux/cgroup-defs.h | 13 ++++
kernel/cgroup/cgroup.c | 163 +++++++++++++++++++++++++++++++++++++++++++-
3 files changed, 205 insertions(+), 3 deletions(-)