Re: [PATCHSET for-4.11] cgroup: implement cgroup v2 thread mode

On Sun, 2017-02-12 at 13:16 -0800, Paul Turner wrote:

On Thursday, February 9, 2017, Peter Zijlstra [off-list ref] wrote:

quoted

On Thu, Feb 09, 2017 at 05:07:16AM -0800, Paul Turner wrote:

quoted

The only case that this does not support vs ".threads" would be some
hybrid where we co-mingle threads from different processes (with the
processes belonging to the same node in the hierarchy).  I'm not aware
of any usage that looks like this.

If I understand you right; this is a fairly common thing with RT where
we would stuff all the !rt threads of the various processes in a 'misc'
bucket.

Similarly, it happens that we stuff the various rt threads of processes
in a specific (shared) 'rt' bucket.

So I would certainly not like to exclude that setup.

Unless you're using rt groups I'm not sure this one really changes.  
Whether the "misc" threads exist at the parent level or one below
should not matter.

(with exclusive cpusets, a mask can exist at one and only one location)