diff options
| author | Sebastian Andrzej Siewior | 2021-10-06 13:18:49 +0200 |
|---|---|---|
| committer | Peter Zijlstra | 2021-10-15 11:25:16 +0200 |
| commit | da6ff09943491819e077b94c284bf0a6b751c9b8 (patch) | |
| tree | 6fbf4c728598ba9d5b9954c1a4fc301dab9cd625 | |
| parent | 66558b730f2533cc2bf2b74d51f5f80b81e2bad0 (diff) | |
sched/rt: Annotate the RT balancing logic irqwork as IRQ_WORK_HARD_IRQ
The push-IPI logic for RT tasks expects to be invoked from hardirq
context. One reason is that a RT task on the remote CPU would block the
softirq processing on PREEMPT_RT and so avoid pulling / balancing the RT
tasks as intended.
Annotate root_domain::rto_push_work as IRQ_WORK_HARD_IRQ.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211006111852.1514359-2-bigeasy@linutronix.de
| -rw-r--r-- | kernel/sched/topology.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index c1729f9a715f..e81246787560 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -526,7 +526,7 @@ static int init_rootdomain(struct root_domain *rd) #ifdef HAVE_RT_PUSH_IPI rd->rto_cpu = -1; raw_spin_lock_init(&rd->rto_lock); - init_irq_work(&rd->rto_push_work, rto_push_irq_work_func); + rd->rto_push_work = IRQ_WORK_INIT_HARD(rto_push_irq_work_func); #endif rd->visit_gen = 0; |