Commit 4fc19ace authored Apr 13, 2018 by Kyle Yan Committed by Jonathan Avila Jan 11, 2019

cpufreq: schedutil: update warn_on with bug_on



WARN_ON is used in calculating schedutil average capacity
this is called under rq->lock held, when WARN_ON is triggered
it tries to wake_up the process on the same CPU for debug
prints inturn waits for the rq->lock triggering dead lock
Update WARN_ON with BUG_ON avoiding the debug prints.

Change-Id: I8db35a2165e68765b4ab2f132a571ad00311ba25
Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org>
Signed-off-by: Kyle Yan <kyan@codeaurora.org>
Signed-off-by: Jonathan Avila <avilaj@codeaurora.org>

parent ccaa1d0e

kernel/sched/cpufreq_schedutil.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -199,7 +199,7 @@ static void sugov_calc_avg_cap(struct sugov_policy *sg_policy, u64 curr_ws,
		if (unlikely(!sysctl_sched_use_walt_cpu_util))
		return;

		WARN_ON(curr_ws < last_ws);
		BUG_ON(curr_ws < last_ws);
		if (curr_ws <= last_ws)
		return;