[RFC 0/4] cgroup hierarchy controls and stats

[RFC 0/4] cgroup hierarchy controls and stats

[Roman Gushchin]

Date: Wed,  2 Aug 2017 17:55:28 +0100
From: Roman Gushchin <guro@fb.com>
To: cgroups@vger.kernel.org
Cc: Roman Gushchin <guro@fb.com>
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(-)

--
2.13.3

Re: [RFC 0/4] cgroup hierarchy controls and stats

[Tejun Heo]

Hello,

On Wed, Aug 02, 2017 at 05:55:28PM +0100, Roman Gushchin wrote:
> 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.

Applied 1-4 to cgroup/for-4.14.  We *might* have further discussions
on the specifics of the interface but in terms of feature and internal
implementation, I don't think there's anything which can be
controversial.

Thanks.

-- 
tejun

[RFC 0/4] cgroup hierarchy controls and stats

[Roman Gushchin]

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(-)

--
2.13.3