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Message-Id: <20221215090029.2972236-1-qiang1.zhang@intel.com>
Date: Thu, 15 Dec 2022 17:00:29 +0800
From: Zqiang <qiang1.zhang@...el.com>
To: paulmck@...nel.org, frederic@...nel.org, quic_neeraju@...cinc.com,
joel@...lfernandes.org
Cc: rcu@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] rcu: Remove duplicate settings for rcu boost kthreads affinity
Currently, when CPUs going offline, the rcu boost kthreads CPU
affinity has been reset in rcutree_offline_cpu(), therefore this
commit remove duplicate settings in rcutree_dead_cpu().
Signed-off-by: Zqiang <qiang1.zhang@...el.com>
---
kernel/rcu/tree.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 65f3dd2fd3ae..20de83ed0c7e 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -4122,15 +4122,10 @@ static void rcu_cleanup_dead_rnp(struct rcu_node *rnp_leaf)
*/
int rcutree_dead_cpu(unsigned int cpu)
{
- struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu);
- struct rcu_node *rnp = rdp->mynode; /* Outgoing CPU's rdp & rnp. */
-
if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
return 0;
WRITE_ONCE(rcu_state.n_online_cpus, rcu_state.n_online_cpus - 1);
- /* Adjust any no-longer-needed kthreads. */
- rcu_boost_kthread_setaffinity(rnp, -1);
// Stop-machine done, so allow nohz_full to disable tick.
tick_dep_clear(TICK_DEP_BIT_RCU);
return 0;
--
2.25.1
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