Paul E. McKenney f92c734f02
rcu: Prevent rcu_barrier() from starting needless grace periods ...
Currently rcu_barrier() uses call_rcu() to enqueue new callbacks
on each CPU with a non-empty callback list. This works, but means
that rcu_barrier() forces grace periods that are not otherwise needed.
The key point is that rcu_barrier() never needs to wait for a grace
period, but instead only for all pre-existing callbacks to be invoked.
This means that rcu_barrier()'s new callbacks should be placed in
the callback-list segment containing the last pre-existing callback.
This commit makes this change using the new rcu_segcblist_entrain()
function.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com >
2017-06-08 08:25:22 -07:00
2015-04-08 09:39:59 -04:00
2017-01-09 11:10:02 +00:00
2016-12-25 17:21:22 +01:00
2016-02-26 10:52:48 +09:00
2016-10-28 08:48:16 -06:00
2017-04-20 12:16:10 -06:00
2017-04-25 11:57:45 -04:00
2017-04-18 14:07:26 +02:00
2017-02-10 16:02:26 +01:00
2015-03-12 12:18:51 -07:00
2015-04-15 16:35:19 -07:00
2017-02-22 16:41:27 -08:00
2016-09-02 20:05:05 +02:00
2016-07-14 22:16:05 -07:00
2016-10-25 14:40:39 +02:00
2017-04-30 00:36:53 -04:00
2017-05-03 19:00:29 -07:00
2016-03-20 13:44:34 -04:00
2015-09-01 14:32:44 -07:00
2016-01-08 11:38:13 -05:00
2015-04-13 11:44:52 -03:00
2017-05-08 17:15:16 -07:00
2015-10-20 21:56:10 -04:00
2014-11-13 16:11:32 +01:00
2014-03-12 23:04:35 +00:00
2016-07-26 16:19:19 -07:00
2016-12-09 09:13:30 -05:00
2016-08-17 11:13:07 +02:00
2015-04-07 12:31:12 -04:00
2017-04-29 00:20:49 +02:00
2014-08-07 20:40:40 -04:00
2016-09-29 10:03:38 +02:00
2016-03-24 10:52:25 -07:00
2016-07-14 09:03:57 +02:00
2016-07-15 08:08:13 -04:00
2016-09-13 15:23:12 +02:00
2016-11-24 11:55:43 -05:00
2015-04-08 09:40:01 -04:00
2016-05-02 10:33:11 +02:00
2017-02-22 16:41:29 -08:00
2015-03-25 08:57:22 -04:00
2016-07-15 15:55:01 -07:00
2015-01-13 17:51:08 -05:00
2015-11-06 17:50:42 -08:00
2017-02-22 16:41:27 -08:00
2016-04-01 17:03:37 -05:00
2016-03-17 15:09:34 -07:00
2014-08-06 18:01:20 -07:00
2016-09-16 23:55:30 +02:00
2016-07-15 15:52:41 -04:00
2015-03-25 08:57:22 -04:00
2017-06-08 08:25:22 -07:00
2017-04-06 11:10:41 +01:00
2017-04-04 11:44:06 +02:00
2016-04-11 16:57:09 -04:00
2015-08-05 12:27:09 -07:00
2016-07-13 15:53:43 -04:00
2016-02-07 14:13:05 -05:00
2016-12-19 09:05:20 -05:00
2017-03-03 09:45:01 -05:00
2015-06-02 08:03:25 -07:00
2015-08-31 10:47:14 -04:00
2015-08-03 23:15:50 +08:00
2017-05-05 15:54:45 +08:00
2014-08-13 18:20:42 +10:00
2017-02-27 13:26:17 -08:00
2016-03-08 11:19:28 -05:00
2017-01-05 18:10:04 -05:00
2017-04-14 22:37:02 -03:00
2015-12-18 13:53:31 -02:00
2017-02-22 16:41:29 -08:00
2016-08-02 02:57:29 +03:00
2016-11-10 13:53:32 -07:00
2017-02-24 17:46:54 -08:00
2017-01-25 13:17:47 -05:00
2017-03-27 08:56:58 +02:00
f92c734f02