Messages in this thread Patch in this message | | | From | Vineeth Remanan Pillai <> | Subject | [RFC PATCH 04/16] sched/fair: Add a few assertions | Date | Tue, 30 Jun 2020 21:32:25 +0000 |
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From: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- kernel/sched/fair.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 5e9f11c8256f..e44a43b87975 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6203,6 +6203,11 @@ static int select_idle_sibling(struct task_struct *p, int prev, int target) } symmetric: + /* + * per-cpu select_idle_mask usage + */ + lockdep_assert_irqs_disabled(); + if (available_idle_cpu(target) || sched_idle_cpu(target)) return target; @@ -6644,8 +6649,6 @@ 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 sd_flag, int wake_flags) @@ -6656,6 +6659,11 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f int want_affine = 0; int sync = (wake_flags & WF_SYNC) && !(current->flags & PF_EXITING); + /* + * required for stable ->cpus_allowed + */ + lockdep_assert_held(&p->pi_lock); + if (sd_flag & SD_BALANCE_WAKE) { record_wakee(p); -- 2.17.1
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