Re: [PATCH] Documentation: cgroup: clarify controller enabling semantics

[Vishal Chourasia <vishalc@linux.ibm.com>]

On Tue, May 27, 2025 at 11:58:50AM +0200, Michal Koutný wrote:
> Hello.
> 
> On Tue, May 27, 2025 at 02:23:36PM +0530, Vishal Chourasia <vishalc@linux.ibm.com> wrote:
> > --- a/Documentation/admin-guide/cgroup-v2.rst
> > +++ b/Documentation/admin-guide/cgroup-v2.rst
> > @@ -438,8 +438,8 @@ Controlling Controllers
> >  Enabling and Disabling
> >  ~~~~~~~~~~~~~~~~~~~~~~
> >  
> > -Each cgroup has a "cgroup.controllers" file which lists all
> > -controllers available for the cgroup to enable::
> > +Each cgroup has a cgroup.controllers file, which lists all the controllers
> > +available for that cgroup and which can be enabled for its children.
> >  
> >    # cat cgroup.controllers
> >    cpu io memory
> 
> Honestly, I see little difference between the two resulting formulations.
> Could you perhaps add an example where the documentation confused you or
> behavior was not what you expected based on the docs?

You are right, there is little difference. I wanted to highlight the
point, that, Availablity means controller can be used to resource
control a cgroup, while Enablement means controller is now "availble" to
children of the cgroup.

Regards,
Vishal

> 
> Thanks,
> Michal