On Wed, Jul 22, 2015 at 04:12:36PM -0400, Waiman Long wrote: > The smp_store_release() is not a full barrier. In order to avoid missed > wakeup, we may need to add memory barrier around locked and cpu state > variables adding to complexity. As the chance of spurious wakeup is very > low, it is easier and safer to just do an unconditional kick at unlock > time.
This needs to better spell out the race; my still sleeping brain doesn't want to co-operate and its generally better to spell out these things anyway. -- 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/
