On Fri, Feb 12, 2016 at 03:03:34PM -0500, Tejun Heo wrote: > On Thu, Feb 11, 2016 at 01:34:49PM -0500, Johannes Weiner wrote: > > From 89e581ca54bdca37d6c464334d2217d14a229540 Mon Sep 17 00:00:00 2001 > > From: Johannes Weiner <[email protected]> > > Date: Wed, 10 Feb 2016 17:29:31 -0500 > > Subject: [PATCH] cgroup: provide cgroup_no_v1= to disable controllers in v1 > > mounts > > Applied to cgroup/for-4.6. Can you please send another patch to > update Documentation/kernel-parameters.txt and cgroup.txt for the new > knob?
How about this? >From 95ae2ca2211e0db4db63d2dd1b187e299d9490fb Mon Sep 17 00:00:00 2001 From: Johannes Weiner <[email protected]> Date: Tue, 16 Feb 2016 13:19:11 -0500 Subject: [PATCH] cgroup: document cgroup_no_v1= Add cgroup_no_v1= to kernel-parameters.txt, and a small blurb to cgroup-v2.txt section about transitioning from cgroup to cgroup2. Signed-off-by: Johannes Weiner <[email protected]> --- Documentation/cgroup-v2.txt | 6 ++++++ Documentation/kernel-parameters.txt | 5 +++++ 2 files changed, 11 insertions(+) diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index e2f4e7948a66..e892c7ab39ef 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -132,6 +132,12 @@ strongly discouraged for production use. It is recommended to decide the hierarchies and controller associations before starting using the controllers after system boot. +During transition to v2, system management software might still +automount the v1 cgroup filesystem and so hijack all controllers +during boot, before manual intervention is possible. To make testing +and experimenting easier, the kernel parameter cgroup_no_v1= allows +disabling controllers in v1 and make them always available in v2. + 2-2. Organizing Processes diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 444bff30e1cf..150173f47115 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -608,6 +608,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. cut the overhead, others just disable the usage. So only cgroup_disable=memory is actually worthy} + cgroup_no_v1= [KNL] Disable one, multiple, all cgroup controllers in v1 + Format: { controller[,controller...] | "all" } + Like cgroup_disable, but only applies to cgroup v1; + the blacklisted controllers remain available in cgroup2. + cgroup.memory= [KNL] Pass options to the cgroup memory controller. Format: <string> nosocket -- Disable socket memory accounting. -- 2.7.1
