Messages in this thread |  | | Date | Wed, 5 Oct 2016 10:21:02 +0200 | From | Sebastian Andrzej Siewior <> | Subject | Re: [RFC][PATCH 4/4] futex: Rewrite FUTEX_UNLOCK_PI |
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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
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