On Sun, Apr 19, 2015 at 12:17 PM, Davidlohr Bueso <d...@stgolabs.net> wrote: > > Naturally, this can cause spurious wakeups. However there is core code > that cannot handle them afaict, and furthermore tglx does have the point > that other events can already trigger them anyway.
Indeed. We need to make this *very* explicit. We have absolutely _always_ had spurious wakeups. The semaphore code does it today, other code has done it historically. Nobody should ever expect that there si only one unique wakeup source. Anybody who sleeps on a condition needs to re-check the condition rather than assume that "because I was woken up the condition must now be true". Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/