On Wed 05-09-12 13:12:38, Tejun Heo wrote: > Hello, Michal. > > On Wed, Sep 05, 2012 at 04:49:42PM +0200, Michal Hocko wrote: > > Can we settle on the following 3 steps? > > 1) warn about "flat" hierarchies (give it X releases) - I will push it > > to as many Suse code streams as possible (hope other distributions > > could do the same) > > I think I'm just gonna trigger WARN from cgroup core if anyone tries > to create hierarchy with a controller which doesn't support full > hierarchy. WARN_ON_ONCE() at first and then WARN_ON() on each > creation later on. How do you find out that a controller is not fully hierarchical? Memory controller can be both. > > 2) flip the default on the root cgroup & warn when somebody tries to > > change it to 0 (give it another X releases) that the knob will be > > removed > > 3) remove the knob and the whole nonsese > > 4) revert 3 if somebody really objects > > If we can get to 3, I don't think 4 would be a problem. Agreed. -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>