| Message ID | 08070dbf56439c84b8c25837c2049ff8e8eafd6e.1363617402.git.viresh.kumar@linaro.org |
|---|---|
| State | Accepted |
| Headers | show |
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 9290bb5..adf331a 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -85,7 +85,7 @@ MODULE_PARM_DESC( static int mmc_schedule_delayed_work(struct delayed_work *work, unsigned long delay) { - return queue_delayed_work(workqueue, work, delay); + return queue_delayed_work_on_any_cpu(workqueue, work, delay); } /*
mmc uses workqueues for running mmc_rescan(). 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 queue_delayed_work() with queue_delayed_work_on_any_cpu() siblings. This routine 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: Chris Ball <cjb@laptop.org> Cc: linux-mmc@vger.kernel.org Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/mmc/core/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)