Re: [PATCH] Documentation: cgroups: Add notes on removing PIDs fromtasks and cgroups requiring setup

[Mike Heffner]

On 03/09/2011 06:13 PM, Paul Menage wrote:
> On Wed, Mar 9, 2011 at 1:09 PM, Eric B Munson<emunson@xxxxxxxxx>  wrote:
> > +Note: To remove a task from a cgroup you must write its PID to the root
> > +tasks file.
> > +
>
> This isn't really accurate - the root cgroup is a cgroup like all the
> others. More accurate would be something like:
>
> Since every task is always a member of exactly one cgroup in each
> mounted hierarchy, to remove a task from its current cgroup you must
> move it into a new cgroup (possibly the root cgroup) by writing to the
> new cgroup's tasks file.


If we are updating this documentation, can we include a blurb that 
mentions if the 'ns' cgroup is mounted in the hierarchy, moving a 
process to a new cgroup can fail?


Mike

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