Messages in this thread Patch in this message | | | From | "Paul E. McKenney" <> | Subject | [PATCH RFC tip/core/rcu 4/5] rcu: Wake grace-period kthread at end of expedited grace period | Date | Tue, 30 Jun 2015 14:48:29 -0700 |
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From: "Paul E. McKenney" <paulmck@linux.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@linux.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
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