PM / Sleep: Do not check wakeup too often in try_to_freeze_tasks() (6c83b481) · Commits · 戴 / test

Use the observation that it is more efficient to check the wakeup variable once before the loop reporting tasks that were not frozen in try_to_freeze_tasks() than to do that in every step of that loop. Signed-off-by:

Rafael J. Wysocki <rjw@sisk.pl>

kernel/power/process.c

+9 −7

Original line number	Diff line number	Diff line
		@@ -98,13 +98,15 @@ static int try_to_freeze_tasks(bool user_only)
		elapsed_csecs / 100, elapsed_csecs % 100,
		todo - wq_busy, wq_busy);

		if (!wakeup) {
		read_lock(&tasklist_lock);
		do_each_thread(g, p) {
		if (!wakeup && !freezer_should_skip(p) &&
		p != current && freezing(p) && !frozen(p))
		if (p != current && !freezer_should_skip(p)
		&& freezing(p) && !frozen(p))
		sched_show_task(p);
		} while_each_thread(g, p);
		read_unlock(&tasklist_lock);
		}
		} else {
		printk("(elapsed %d.%02d seconds) ", elapsed_csecs / 100,
		elapsed_csecs % 100);

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