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Date: Tue, 30 Jun 2015 14:48:29 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: mingo@...nel.org, laijs@...fujitsu.com, dipankar@...ibm.com, akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com, josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com, dvhart@...ux.intel.com, fweisbec@...il.com, oleg@...hat.com, bobby.prani@...il.com, "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Subject: [PATCH RFC tip/core/rcu 4/5] rcu: Wake grace-period kthread at end of expedited grace period From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> Let the expedited grace period confer its lower latency onto any normal grace period that is in progress. Signed-off-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com> --- kernel/rcu/tree.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 5365f6332a60..308b6acb4260 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3507,6 +3507,8 @@ void synchronize_sched_expedited(void) rcu_exp_gp_seq_end(rsp); mutex_unlock(&rnp->exp_funnel_mutex); smp_mb(); /* ensure subsequent action seen after grace period. */ + if (rsp->gp_kthread && rcu_gp_in_progress(rsp)) + wake_up(&rsp->gp_wq); put_online_cpus(); } -- 1.8.1.5 -- 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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