From: Viresh Kumar <[email protected]> Date: Mon, 18 Mar 2013 20:53:26 +0530
> Phylib uses workqueues for multiple purposes. There is no real dependency of > scheduling these on the cpu which scheduled them. > > On a idle system, it is observed that and idle cpu wakes up many times just to > service this work. It would be better if we can schedule it on a cpu which > isn't > idle to save on power. > > By idle cpu (from scheduler's perspective) we mean: > - Current task is idle task > - nr_running == 0 > - wake_list is empty > > This patch replaces the schedule_work() and schedule_delayed_work() routines > with their queue_[delayed_]work_on_any_cpu() siblings with system_wq as > parameter. > > These routines would look for the closest (via scheduling domains) non-idle > cpu > (non-idle from schedulers perspective). If the current cpu is not idle or all > cpus are idle, work will be scheduled on local cpu. > > Cc: "David S. Miller" <[email protected]> > Cc: [email protected] > Signed-off-by: Viresh Kumar <[email protected]> This will need to be applied to whatever tree adds these new interfaces, and for that: Acked-by: David S. Miller <[email protected]> -- 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/
