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From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
	mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com,
	akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
	josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
	rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
	fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org
Subject: [PATCH tip/core/rcu 0/10] Expedited grace-period updates for v5.6
Date: Mon, 9 Dec 2019 20:01:22 -0800
Message-ID: <20191210040122.GA2419@paulmck-ThinkPad-P72> (raw)

Hello!

This series provides updates to RCU's expedited grace periods:

1.	Use *_ONCE() to protect lockless ->expmask accesses.

2.	Avoid modifying mask_ofl_ipi in sync_rcu_exp_select_node_cpus(),
	courtesy of Boqun Feng.

3.	Fix data-race due to atomic_t copy-by-value, courtesy of
	Marco Elver.

4.	Lookup instead of bit-twiddling in sync_rcu_exp_select_node_cpus().

5.	Fix missed wakeup of exp_wq waiters, courtesy of Neeraj Upadhyay.

6.	Allow only one expedited GP to run concurrently with wakeups,
	courtesy of Neeraj Upadhyay.

7.	Rename sync_rcu_preempt_exp_done() to sync_rcu_exp_done().

8.	Update tree_exp.h function-header comments.

9.	Replace synchronize_sched_expedited_wait() "_sched" with "_rcu".

10.	Enable tick for nohz_full CPUs slow to provide expedited QS.

							Thanx, Paul

------------------------------------------------------------------------

 include/linux/tick.h       |    5 +
 include/trace/events/rcu.h |    4 -
 kernel/rcu/tree.c          |   11 +--
 kernel/rcu/tree.h          |    1 
 kernel/rcu/tree_exp.h      |  149 +++++++++++++++++++++++++++------------------
 kernel/rcu/tree_plugin.h   |    4 -
 6 files changed, 107 insertions(+), 67 deletions(-)

             reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-10  4:01 Paul E. McKenney [this message]
2019-12-10  4:01 ` [PATCH tip/core/rcu 01/10] rcu: Use *_ONCE() to protect lockless ->expmask accesses paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 02/10] rcu: Avoid modifying mask_ofl_ipi in sync_rcu_exp_select_node_cpus() paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 03/10] rcu: Fix data-race due to atomic_t copy-by-value paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 04/10] rcu: Substitute lookup for bit-twiddling in sync_rcu_exp_select_node_cpus() paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 05/10] rcu: Fix missed wakeup of exp_wq waiters paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 06/10] rcu: Allow only one expedited GP to run concurrently with wakeups paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 07/10] rcu: Rename sync_rcu_preempt_exp_done() to sync_rcu_exp_done() paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 08/10] rcu: Update tree_exp.h function-header comments paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 09/10] rcu: Replace synchronize_sched_expedited_wait() "_sched" with "_rcu" paulmck
2019-12-10  4:01 ` [PATCH tip/core/rcu 10/10] rcu: Enable tick for nohz_full CPUs slow to provide expedited QS paulmck

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