Merge "sched/fair: Improve the scheduler" (759dd5e5) · Commits · e / devices / android_kernel_fairphone_FP4

kernel/sched/fair.c

+21 −2

Original line number	Diff line number	Diff line
		@@ -11768,6 +11768,21 @@ static inline bool nohz_idle_balance(struct rq *this_rq, enum cpu_idle_type idle
		static inline void nohz_newidle_balance(struct rq *this_rq) { }
		#endif /* CONFIG_NO_HZ_COMMON */

		static bool silver_has_big_tasks(void)
		{
		int cpu;

		for_each_possible_cpu(cpu) {
		if (!is_min_capacity_cpu(cpu))
		break;

		if (walt_big_tasks(cpu))
		return true;
		}

		return false;
		}

		/*
		* idle_balance is called by schedule() if this_cpu is about to become
		* idle. Attempts to pull tasks from other CPUs.
		@@ -11781,6 +11796,10 @@ static int idle_balance(struct rq this_rq, struct rq_flags rf)
		u64 curr_cost = 0;
		u64 avg_idle = this_rq->avg_idle;
		bool prefer_spread = prefer_spread_on_idle(this_cpu);
		bool force_lb = (!is_min_capacity_cpu(this_cpu) &&
		silver_has_big_tasks() &&
		(atomic_read(&this_rq->nr_iowait) == 0));


		if (cpu_isolated(this_cpu))
		return 0;
		@@ -11797,7 +11816,7 @@ static int idle_balance(struct rq this_rq, struct rq_flags rf)
		if (!cpu_active(this_cpu))
		return 0;

		if (prefer_spread)
		if (force_lb \|\| prefer_spread)
		avg_idle = ULLONG_MAX;
		/*
		* This is OK, because current is on_cpu, which avoids it being picked
		@@ -11832,7 +11851,7 @@ static int idle_balance(struct rq this_rq, struct rq_flags rf)
		if (!(sd->flags & SD_LOAD_BALANCE))
		continue;

		if (prefer_spread &&
		if (prefer_spread && !force_lb &&
		(sd->flags & SD_ASYM_CPUCAPACITY) &&
		!is_asym_cap_cpu(this_cpu))
		avg_idle = this_rq->avg_idle;