From: Paul E. McKenney <paulmck@kernel.org>
Date: Wed, 25 May 2022 03:33:17 +0000 (-0700)
Subject: rcu-tasks: Make rcu_note_context_switch() unconditionally call rcu_tasks_qs()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=6a694411977a6d57ff76a896a745c2f717372dac;p=linux.git

rcu-tasks: Make rcu_note_context_switch() unconditionally call rcu_tasks_qs()

This commit makes rcu_note_context_switch() unconditionally invoke the
rcu_tasks_qs() function, as opposed to doing so only when RCU (as opposed
to RCU Tasks Trace) urgently needs a grace period to end.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: KP Singh <kpsingh@kernel.org>
---

diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h
index c8ba0fe17267c..c966d680b789e 100644
--- a/kernel/rcu/tree_plugin.h
+++ b/kernel/rcu/tree_plugin.h
@@ -899,8 +899,8 @@ void rcu_note_context_switch(bool preempt)
 	this_cpu_write(rcu_data.rcu_urgent_qs, false);
 	if (unlikely(raw_cpu_read(rcu_data.rcu_need_heavy_qs)))
 		rcu_momentary_dyntick_idle();
-	rcu_tasks_qs(current, preempt);
 out:
+	rcu_tasks_qs(current, preempt);
 	trace_rcu_utilization(TPS("End context switch"));
 }
 EXPORT_SYMBOL_GPL(rcu_note_context_switch);