Messages in this thread Patch in this message | | | From | Zqiang <> | Subject | [PATCH] rcu: per-cpu rcuc kthread are created only when rcutree.use_softirq=0 | Date | Wed, 29 Dec 2021 00:05:10 +0800 |
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In non-RT kernel, if the RCU_BOOST is enabled, the per-cpu rcuc kthread will be created, however under the rcutree.use_softirq=1, the RCU core processing only in softirq context, the rcuc kthread doesn't do anything, so remove RCU_BOOST interference.
Signed-off-by: Zqiang <qiang1.zhang@intel.com> --- 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 9b58bae0527a..ed64b4fcb8a0 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2902,7 +2902,7 @@ static int __init rcu_spawn_core_kthreads(void) for_each_possible_cpu(cpu) per_cpu(rcu_data.rcu_cpu_has_work, cpu) = 0; - if (!IS_ENABLED(CONFIG_RCU_BOOST) && use_softirq) + if (use_softirq) return 0; WARN_ONCE(smpboot_register_percpu_thread(&rcu_cpu_thread_spec), "%s: Could not start rcuc kthread, OOM is now expected behavior\n", __func__); -- 2.25.1
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