Commit a85f1a41 authored Apr 24, 2013 by Viresh Kumar Committed by Tejun Heo May 14, 2013

fbcon: queue work on power efficient wq



fbcon uses workqueues and it has 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 the
scheduler believes to be the most appropriate one.

This patch replaces system_wq with system_power_efficient_wq.

Cc: Dave Airlie <airlied@redhat.com>
Cc: linux-fbdev@vger.kernel.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent 695588f9

drivers/video/console/fbcon.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -404,7 +404,7 @@ static void cursor_timer_handler(unsigned long dev_addr)
		struct fb_info info = (struct fb_info ) dev_addr;
		struct fbcon_ops *ops = info->fbcon_par;

		schedule_work(&info->queue);
		queue_work(system_power_efficient_wq, &info->queue);
		mod_timer(&ops->cursor_timer, jiffies + HZ/5);
		}

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