On Wed, May 03, 2017 at 12:37:37PM +0200, Vincent Guittot wrote: > On 3 May 2017 at 11:37, Peter Zijlstra <pet...@infradead.org> wrote:
> > Of course, it could be I overlooked something, in which case, please > > tell :-) > > That's mainly based on the regression i see on my platform. I haven't > find the root cause of the regression but it's there which means that > using group_entity's load_avg to propagate child cfs_rq > runnable_load_avg breaks something (as mentioned on IRC) Right.. so looking through the code, (group) se->avg.load_avg is used in effective_load() (and thereby wake_affine()) and update_cfs_rq_h_load() (and therefore task_h_load()). So changing it will affect those two functions, which could well lead to your regression.
