| Date | Thu, 22 Apr 2021 14:05:00 +0200 | From | Peter Zijlstra <> | Subject | [PATCH 01/19] sched/fair: Add a few assertions |
| |
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- kernel/sched/fair.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
--- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -6246,6 +6246,11 @@ static int select_idle_sibling(struct ta 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; @@ -6711,8 +6716,6 @@ static int find_energy_efficient_cpu(str * 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) @@ -6725,6 +6728,10 @@ select_task_rq_fair(struct task_struct * /* 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);
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