In PREEMPT_RT kernel, if irq work flags is not set, it will be
executed in per-CPU irq_work kthreads. set IRQ_WORK_HARD_IRQ flags
to irq work, put it in the context of hard interrupt execution,
accelerate scheduler to re-evaluate.
Signed-off-by: Zqiang <qiang1.zhang@xxxxxxxxx>
---
kernel/rcu/tree.c | 2 +-
kernel/rcu/tree_plugin.h | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index e2ffbeceba69..a69587773a85 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -678,7 +678,7 @@ static void late_wakeup_func(struct irq_work *work)
}
static DEFINE_PER_CPU(struct irq_work, late_wakeup_work) =
- IRQ_WORK_INIT(late_wakeup_func);
+ IRQ_WORK_INIT_HARD(late_wakeup_func);
/*
* If either:
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index 3037c2536e1f..cf7bd28af8ef 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -661,7 +661,7 @@ static void rcu_read_unlock_special(struct task_struct *t)
expboost && !rdp->defer_qs_iw_pending && cpu_online(rdp->cpu)) {
// Get scheduler to re-evaluate and call hooks.
// If !IRQ_WORK, FQS scan will eventually IPI.
- init_irq_work(&rdp->defer_qs_iw, rcu_preempt_deferred_qs_handler);
+ rdp->defer_qs_iw = IRQ_WORK_INIT_HARD(rcu_preempt_deferred_qs_handler);
rdp->defer_qs_iw_pending = true;
irq_work_queue_on(&rdp->defer_qs_iw, rdp->cpu);
}
--
2.25.1
