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-rw-r--r--kernel/rcu/tree.c25
1 files changed, 15 insertions, 10 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 4f4d9ea6a9cb..74e210ccfd38 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -2525,9 +2525,21 @@ static void rcu_do_batch(struct rcu_data *rdp)
/*
* Stop only if limit reached and CPU has something to do.
*/
- if (count >= bl && in_serving_softirq() &&
- (need_resched() || !is_idle_task(current)))
- break;
+ if (in_serving_softirq()) {
+ if (count >= bl && (need_resched() || !is_idle_task(current)))
+ break;
+ } else {
+ local_bh_enable();
+ lockdep_assert_irqs_enabled();
+ cond_resched_tasks_rcu_qs();
+ lockdep_assert_irqs_enabled();
+ local_bh_disable();
+ }
+
+ /*
+ * Make sure we don't spend too much time here and deprive other
+ * softirq vectors of CPU cycles.
+ */
if (unlikely(tlimit)) {
/* only call local_clock() every 32 callbacks */
if (likely((count & 31) || local_clock() < tlimit))
@@ -2535,13 +2547,6 @@ static void rcu_do_batch(struct rcu_data *rdp)
/* Exceeded the time limit, so leave. */
break;
}
- if (!in_serving_softirq()) {
- local_bh_enable();
- lockdep_assert_irqs_enabled();
- cond_resched_tasks_rcu_qs();
- lockdep_assert_irqs_enabled();
- local_bh_disable();
- }
}
rcu_nocb_lock_irqsave(rdp, flags);