From: laijs@cn.fujitsu.com (Lai Jiangshan)
Subject: [ltt-dev] [PATCH 5/7] urcu, call_rcu: avoid create call_rcu_data for child when unneed
Date: Wed, 28 Sep 2011 16:34:31 +0800 [thread overview]
Message-ID: <061a717cef1fd918d0a2a95b142e51a2c5a85ff5.1317198301.git.laijs@cn.fujitsu.com> (raw)
In-Reply-To: <cover.1317198301.git.laijs@cn.fujitsu.com>
Signed-off-by: Lai Jiangshan <laijs at cn.fujitsu.com>
---
urcu-call-rcu-impl.h | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/urcu-call-rcu-impl.h b/urcu-call-rcu-impl.h
index 87d9157..65c1c7a 100644
--- a/urcu-call-rcu-impl.h
+++ b/urcu-call-rcu-impl.h
@@ -675,6 +675,10 @@ void call_rcu_after_fork_child(void)
/* Release the mutex. */
call_rcu_unlock(&call_rcu_mutex);
+ /* Do nothing when call_rcu() has not been used */
+ if (cds_list_empty(&call_rcu_data_list))
+ return;
+
/*
* Allocate a new default call_rcu_data structure in order
* to get a working call_rcu thread to go with it.
--
1.7.4.4
next prev parent reply other threads:[~2011-09-28 8:34 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-28 8:34 [ltt-dev] [PATCH 0/7] urcu,call_rcu: minior fixes, round2 Lai Jiangshan
2011-09-28 8:34 ` [ltt-dev] [PATCH 1/7] urcu, call_rcu: protects call_rcu_data_list when remove node Lai Jiangshan
2011-09-29 17:00 ` Mathieu Desnoyers
2011-09-28 8:34 ` [ltt-dev] [PATCH 2/7] urcu, defer_rcu: fix missing respond to a cancellation request Lai Jiangshan
2011-09-29 17:13 ` Mathieu Desnoyers
2011-09-28 8:34 ` [ltt-dev] [PATCH 3/7] urcu, defer_rcu: Avoid thread exit unexpected Lai Jiangshan
2011-09-29 17:27 ` Mathieu Desnoyers
2011-09-28 8:34 ` [ltt-dev] [PATCH 4/7] urcu, defer_rcu: Simplify defer_rcu() encoding Lai Jiangshan
2011-09-29 17:49 ` Mathieu Desnoyers
2011-09-28 8:34 ` Lai Jiangshan [this message]
2011-09-29 17:27 ` [ltt-dev] [PATCH 5/7] urcu, call_rcu: avoid create call_rcu_data for child when unneed Paul E. McKenney
2011-09-29 17:52 ` Mathieu Desnoyers
2011-09-28 8:34 ` [ltt-dev] [PATCH 6/7] urcu, call_rcu: Cleanup call_rcu_data pointers before used in child Lai Jiangshan
2011-09-29 17:37 ` Paul E. McKenney
2011-09-29 17:59 ` Mathieu Desnoyers
2011-09-29 18:08 ` Paul E. McKenney
2011-09-29 18:19 ` Mathieu Desnoyers
2011-09-29 18:29 ` Paul E. McKenney
2011-09-29 18:28 ` Mathieu Desnoyers
2011-09-29 19:43 ` Mathieu Desnoyers
2011-09-29 19:53 ` Mathieu Desnoyers
2011-09-28 8:34 ` [ltt-dev] [PATCH 7/7] urcu, call_rcu: Array initialized before pointer is planted Lai Jiangshan
2011-09-29 17:33 ` Paul E. McKenney
2011-09-29 20:07 ` Mathieu Desnoyers
2011-09-29 21:13 ` Mathieu Desnoyers
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