On Wed, 2012-10-10 at 13:29 +0100, Mel Gorman wrote: > Do we really switch more though? > > Look at the difference in interrupts vs context switch. IPIs are an interrupt > so if TTWU_QUEUE wakes process B using an IPI, does that count as a context > switch?
Nope. Nor would it for NO_TTWU_QUEUE. A process waking another is just that, a wakeup. A context switch is when we stop running a process and start running anther. A wakeup can lead to us deciding the newly woken task is a better task to run, however its not a given. -- 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/
