On Mon, 2012-12-10 at 20:19 +0800, Hillf Danton wrote: > When we are trying to push task out, no point to select the last cpu that > the given task executed on, which is fixed by selecting target cpu with > cache affinity concerned, and with SD_WAKE_AFFINE ignored as we are not > handling sleeper.
I have to ask. Why? The check you are skipping is if the task is running on a CPU that is already the lowest CPU priority (lowest_mask returns the CPUs running tasks of the lowest priority in the system). Which means that either the task that we are pushing is the same priority or lesser priority than what is running on the other CPUs. Either case, this task wont push out a task on the other CPUs because it's not higher priority than those tasks. You just added more work for the same result (no push). -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
