On 2016-10-05 10:09:12 [+0200], Peter Zijlstra wrote: > On Wed, Oct 05, 2016 at 09:41:47AM +0200, Sebastian Andrzej Siewior wrote: > > are those problems DL related? > > One of them, the other is that PI thing you did that ugly nodeboost > thing for, right?
this no-de-boost yes. This is probably a problem since we have this "delayed" wake-up. I've been thinking about a marked in PI state to ignore a de-boost so the spin_unlock() won't be a problem. But if I understand it right, then this won't solve the DL problem since you can't have two tasks at the same priority. Sebastian
