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Message-Id: <1406092194-13004-16-git-send-email-bobby.prani@gmail.com> Date: Wed, 23 Jul 2014 01:09:52 -0400 From: Pranith Kumar <bobby.prani@...il.com> To: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>, Josh Triplett <josh@...htriplett.org>, Steven Rostedt <rostedt@...dmis.org>, Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Lai Jiangshan <laijs@...fujitsu.com>, linux-kernel@...r.kernel.org (open list:READ-COPY UPDATE...) Subject: [PATCH 15/16] rcu: Check for a nocb cpu before trying to spawn nocb threads This commit tries to spawn nocb kthreads only when the CPU is marked as a nocb cpu. This is a minor optimization. Signed-off-by: Pranith Kumar <bobby.prani@...il.com> --- kernel/rcu/tree_plugin.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 541c776..8abff0a 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -1490,7 +1490,8 @@ static void rcu_prepare_kthreads(int cpu) return; rcu_spawn_one_boost_kthread(rcu_state_p, rnp); - rcu_spawn_all_nocb_kthreads(cpu); + if (rcu_is_nocb_cpu(cpu)) + rcu_spawn_all_nocb_kthreads(cpu); } #else /* #ifdef CONFIG_RCU_BOOST */ -- 2.0.0.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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