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| author | Peter Zijlstra <peterz@infradead.org> | 2020-10-14 21:39:04 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-10-29 11:00:30 +0100 |
| commit | b13772f8135633f273f0cf742143b19cffbf9e1d (patch) | |
| tree | 01ae7f3e51e0c94d829ace28f75c14250f3e4165 /kernel/sched/deadline.c | |
| parent | 934fc3314b39e16a89fc4d5d0d5cbfe71dcbe7b1 (diff) | |
| download | lwn-b13772f8135633f273f0cf742143b19cffbf9e1d.tar.gz lwn-b13772f8135633f273f0cf742143b19cffbf9e1d.zip | |
sched/cpupri: Add CPUPRI_HIGHER
Add CPUPRI_HIGHER above the RT99 priority to denote the CPU is in use
by higher priority tasks (specifically deadline).
XXX: we should probably drive PUSH-PULL from cpupri, that would
automagically result in an RT-PUSH when DL sets cpupri to CPUPRI_HIGHER.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Diffstat (limited to 'kernel/sched/deadline.c')
| -rw-r--r-- | kernel/sched/deadline.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 0f75e95ae024..0b45dd1068f7 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1394,6 +1394,8 @@ static void inc_dl_deadline(struct dl_rq *dl_rq, u64 deadline) if (dl_rq->earliest_dl.curr == 0 || dl_time_before(deadline, dl_rq->earliest_dl.curr)) { + if (dl_rq->earliest_dl.curr == 0) + cpupri_set(&rq->rd->cpupri, rq->cpu, CPUPRI_HIGHER); dl_rq->earliest_dl.curr = deadline; cpudl_set(&rq->rd->cpudl, rq->cpu, deadline); } @@ -1411,6 +1413,7 @@ static void dec_dl_deadline(struct dl_rq *dl_rq, u64 deadline) dl_rq->earliest_dl.curr = 0; dl_rq->earliest_dl.next = 0; cpudl_clear(&rq->rd->cpudl, rq->cpu); + cpupri_set(&rq->rd->cpupri, rq->cpu, rq->rt.highest_prio.curr); } else { struct rb_node *leftmost = dl_rq->root.rb_leftmost; struct sched_dl_entity *entry; |