sched/fair: Add a few assertions
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Don Hiatt <dhiatt@digitalocean.com> Tested-by: Hongyu Ning <hongyu.ning@linux.intel.com> Tested-by: Vincent Guittot <vincent.guittot@linaro.org> Link: https://lkml.kernel.org/r/20210422123308.015639083@infradead.org
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@ -6288,6 +6288,11 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target)
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task_util = uclamp_task_util(p);
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}
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/*
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* per-cpu select_idle_mask usage
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*/
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lockdep_assert_irqs_disabled();
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if ((available_idle_cpu(target) || sched_idle_cpu(target)) &&
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asym_fits_capacity(task_util, target))
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return target;
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@ -6781,8 +6786,6 @@ unlock:
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* certain conditions an idle sibling CPU if the domain has SD_WAKE_AFFINE set.
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*
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* Returns the target CPU number.
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*
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* preempt must be disabled.
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*/
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static int
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select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags)
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@ -6795,6 +6798,10 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int wake_flags)
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/* SD_flags and WF_flags share the first nibble */
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int sd_flag = wake_flags & 0xF;
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/*
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* required for stable ->cpus_allowed
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*/
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lockdep_assert_held(&p->pi_lock);
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if (wake_flags & WF_TTWU) {
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record_wakee(p);
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