On Thu, 2014-10-02 at 13:15 -0400, Rik van Riel wrote: > This patch is ugly. I have not bothered cleaning it up, because it > causes a regression with hackbench. Apparently for hackbench (and > potentially other sync wakeups), locality is more important than > idleness. > > We may need to add a third clause before the search, something > along the lines of, to ensure target gets selected if neither > target or i are idle and the wakeup is synchronous... > > if (sync_wakeup && cpu_of(target)->nr_running == 1) > return target;
I recommend you forget that trusting sync hint ever sprang to mind, it is often a big fat lie. -Mike -- 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/
