From: "Paul E. McKenney" <paul...@linux.vnet.ibm.com>
In some situations, randomly delaying RCU grace-period initialization
can cause more trouble than help. This commit therefore restricts this
type of RCU self-torture to runtime, giving it a rest during boot and
shutdown.
Reported-by: Sasha Levin <sasha.le...@oracle.com>
Signed-off-by: Paul E. McKenney <paul...@linux.vnet.ibm.com>
---
kernel/rcutree.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 71df6f9..0e52250 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1319,7 +1319,8 @@ static int rcu_gp_init(struct rcu_state *rsp)
rnp->grphi, rnp->qsmask);
raw_spin_unlock_irq(&rnp->lock);
#ifdef CONFIG_PROVE_RCU_DELAY
- if ((random32() % (rcu_num_nodes * 8)) == 0)
+ if ((random32() % (rcu_num_nodes * 8)) == 0 &&
+ system_state == SYSTEM_RUNNING)
schedule_timeout_uninterruptible(2);
#endif /* #ifdef CONFIG_PROVE_RCU_DELAY */
cond_resched();
--
1.8.1.5
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