From: Neeraj Upadhyay <neeraju@codeaurora.org>
To: paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org,
mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com,
joel@joelfernandes.org
Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org,
Neeraj Upadhyay <neeraju@codeaurora.org>
Subject: [PATCH] rcu/tree: Force quiescent state on callback overload
Date: Mon, 22 Jun 2020 00:07:27 +0530 [thread overview]
Message-ID: <1592764647-2452-1-git-send-email-neeraju@codeaurora.org> (raw)
On callback overload, we want to force quiescent state immediately,
for the first and second fqs. Enforce the same, by including
RCU_GP_FLAG_OVLD flag, in fqsstart check.
Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
---
kernel/rcu/tree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index d0988a1..6226bfb 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -1865,7 +1865,7 @@ static void rcu_gp_fqs_loop(void)
break;
/* If time for quiescent-state forcing, do it. */
if (!time_after(rcu_state.jiffies_force_qs, jiffies) ||
- (gf & RCU_GP_FLAG_FQS)) {
+ (gf & (RCU_GP_FLAG_FQS | RCU_GP_FLAG_OVLD))) {
trace_rcu_grace_period(rcu_state.name, rcu_state.gp_seq,
TPS("fqsstart"));
rcu_gp_fqs(first_gp_fqs);
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
next reply other threads:[~2020-06-21 18:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-21 18:37 Neeraj Upadhyay [this message]
2020-06-21 19:50 ` [PATCH] rcu/tree: Force quiescent state on callback overload Paul E. McKenney
2020-06-21 20:00 ` Neeraj Upadhyay
2020-06-22 3:13 ` Paul E. McKenney
2020-06-22 3:46 ` Neeraj Upadhyay
2020-06-22 22:53 ` Paul E. McKenney
2020-06-23 6:19 ` Neeraj Upadhyay
2020-06-23 15:42 ` Joel Fernandes
2020-06-23 16:29 ` Paul E. McKenney
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