Re: [PATCHSET] cgroup, sched: restructure threadgroup locking and replace it with a percpu_rwsem

[Peter Zijlstra]

On Mon, May 18, 2015 at 12:34:40PM -0400, Tejun Heo wrote:
> On Wed, May 13, 2015 at 04:35:15PM -0400, Tejun Heo wrote:
> > threadgroup locking was added because cgroup needs threadgroups to
> > stay stable across attach operations.  It was implemented as a
> > per-signal_struct generic locking mechanism so that other users which
> > require threadgroups stable across blocking operations can use it too;
> > however, it hasn't grown any other use cases and still conditionalized
> > on CONFIG_CGROUPS.
> 
> Ingo, Peter, what do you guys think? 

I had a brief look and didn't spot anhything really weird. I'll try and
give is a little more time tomorrow.

On routing I think you can take it through the cgroup tree if Ingo is ok
with that.
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