Commit 42d7f7e8 authored Sep 23, 2015 by Bryan O'Donoghue Committed by Greg Kroah-Hartman Sep 23, 2015

greybus: loopback: masked out threads should sleep

If a thread is masked out it should not consume CPU cycles during a test.
We set an arbitrary 100 millisecond sleep time for each masked out thread.
Reasonably blunt instrument to ensure threads with nothing to do don't end
up thrashing the acquisition/release of mutexes.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Patrick Titiano <ptitiano@baylibre.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

parent f01f7a98

drivers/staging/greybus/loopback.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -693,8 +693,10 @@ static int gb_loopback_fn(void *data)
		break;

		mutex_lock(&gb_dev.mutex);
		if (!gb_loopback_active(gb))
		if (!gb_loopback_active(gb)) {
		ms_wait = 100;
		goto unlock_continue;
		}
		if (gb_dev.iteration_max) {
		/* Determine overall lowest count */
		low_count = gb->iteration_count;