lkml.org 
[lkml]   [2015]   [Jun]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH RFC tip/core/rcu 4/5] rcu: Wake grace-period kthread at end of expedited grace period
Date
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


\
 
 \ /
  Last update: 2015-07-01 00:01    [W:0.181 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site