On Tue, May 14, 2019 at 11:12:19AM +0200, Sebastian Andrzej Siewior wrote: > On 2019-05-14 10:43:56 [+0200], Peter Zijlstra wrote: > > Now.. that will fix it, but I think it is also wrong. > > > > The problem being that it violates FIFO, something that might be more > > important on -RT than elsewhere. > > Wouldn't -RT be more about waking the task with the highest priority > instead the one that waited the longest? Possibly, but that's a far larger patch. Also, even with that completions do not avoid inversions and thus don't really make nice RT primitives anyway.
