Commit 9099a147 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

sched/fair: Add a few assertions 



Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: default avatarDon Hiatt <dhiatt@digitalocean.com>
Tested-by: default avatarHongyu Ning <hongyu.ning@linux.intel.com>
Tested-by: default avatarVincent Guittot <vincent.guittot@linaro.org>
Link: https://lkml.kernel.org/r/20210422123308.015639083@infradead.org
parent 0cd7c741

kernel/sched/fair.c

+9 −2
Original line number Diff line number Diff line
@@ -6288,6 +6288,11 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target) 
		task_util = uclamp_task_util(p);

	}



	/*

	 * per-cpu select_idle_mask usage

	 */

	lockdep_assert_irqs_disabled();



	if ((available_idle_cpu(target) || sched_idle_cpu(target)) &&

	    asym_fits_capacity(task_util, target))

		return target;
@@ -6781,8 +6786,6 @@ static int find_energy_efficient_cpu(struct task_struct *p, int prev_cpu) 
 * certain conditions an idle sibling CPU if the domain has SD_WAKE_AFFINE set.

 *

 * Returns the target CPU number.

 *

 * preempt must be disabled.

 */

static int

select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags)
@@ -6795,6 +6798,10 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags) 
	/* SD_flags and WF_flags share the first nibble */

	int sd_flag = wake_flags & 0xF;



	/*

	 * required for stable ->cpus_allowed

	 */

	lockdep_assert_held(&p->pi_lock);

	if (wake_flags & WF_TTWU) {

		record_wakee(p);