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Commit 7274a6f2 authored by Srinivasarao Pathipati's avatar Srinivasarao Pathipati
Browse files

sched/walt: don't panic for accounting issues 



walt's accounting issues are not fatal, reset the variables and
raise warning instead of panic.

Change-Id: Id9f8cdbc1bde1539c33c2000590c81567fc5312a
Signed-off-by: default avatarSrinivasarao Pathipati <quic_c_spathi@quicinc.com>
parent 081bc824

kernel/sched/walt.h

+25 −5
Original line number Diff line number Diff line
@@ -104,14 +104,34 @@ fixup_cumulative_runnable_avg(struct walt_sched_stats *stats, 
			      s64 demand_scaled_delta,

			      s64 pred_demand_scaled_delta)

{

	s64 cumulative_runnable_avg_scaled;

	s64 pred_demands_sum_scaled;



	if (sched_disable_window_stats)

		return;



	stats->cumulative_runnable_avg_scaled += demand_scaled_delta;

	BUG_ON((s64)stats->cumulative_runnable_avg_scaled < 0);

	cumulative_runnable_avg_scaled =

		(s64)stats->cumulative_runnable_avg_scaled +

		demand_scaled_delta;

	pred_demands_sum_scaled =

		(s64)stats->pred_demands_sum_scaled + pred_demand_scaled_delta;



	if (cumulative_runnable_avg_scaled < 0) {

		printk_deferred("WALT-BUG demand_scaled_delta=%lld cumulative_runnable_avg_scaled=%llu\n",

				demand_scaled_delta,

				stats->cumulative_runnable_avg_scaled);

		cumulative_runnable_avg_scaled = 0;

	}

	stats->cumulative_runnable_avg_scaled =

		(u64)cumulative_runnable_avg_scaled;



	stats->pred_demands_sum_scaled += pred_demand_scaled_delta;

	BUG_ON((s64)stats->pred_demands_sum_scaled < 0);

	if (pred_demands_sum_scaled < 0) {

		printk_deferred("WALT-BUG task pred_demand_scaled_delta=%lld pred_demands_sum_scaled=%llu\n",

				pred_demand_scaled_delta,

				stats->pred_demands_sum_scaled);

		pred_demands_sum_scaled = 0;

	}

	stats->pred_demands_sum_scaled = (u64)pred_demands_sum_scaled;

}



static inline void