Commit e8b17594 authored Jan 31, 2014 by Shaibal Dutta Committed by Thomas Gleixner Feb 07, 2014

timekeeping: Move clock sync work to power efficient workqueue



For better use of CPU idle time, allow the scheduler to select the CPU
on which the CMOS clock sync work would be scheduled. This improves
idle residency time and conserver power.

This functionality is enabled when CONFIG_WQ_POWER_EFFICIENT is selected.

Signed-off-by: Shaibal Dutta <shaibal.dutta@broadcom.com>
[zoran.markovic@linaro.org: Added commit message. Aligned code.]
Signed-off-by: Zoran Markovic <zoran.markovic@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Link: http://lkml.kernel.org/r/1391195904-12497-1-git-send-email-zoran.markovic@linaro.org


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 38dbfb59

kernel/time/ntp.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -514,12 +514,13 @@ static void sync_cmos_clock(struct work_struct *work)
		next.tv_sec++;
		next.tv_nsec -= NSEC_PER_SEC;
		}
		schedule_delayed_work(&sync_cmos_work, timespec_to_jiffies(&next));
		queue_delayed_work(system_power_efficient_wq,
		&sync_cmos_work, timespec_to_jiffies(&next));
		}

		void ntp_notify_cmos_timer(void)
		{
		schedule_delayed_work(&sync_cmos_work, 0);
		queue_delayed_work(system_power_efficient_wq, &sync_cmos_work, 0);
		}

		#else