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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, rostedt@goodmis.org
Subject: [PATCH rcu 0/14] Lazy call_rcu() updates for v6.2
Date: Wed, 19 Oct 2022 15:51:38 -0700	[thread overview]
Message-ID: <20221019225138.GA2499943@paulmck-ThinkPad-P17-Gen-1> (raw)

Hello!

This series provides energy efficiency for nearly-idle systems by making
call_rcu() more lazy.  Several NOCB changes come along for the ride:

1.	Simplify rcu_init_nohz() cpumask handling, courtesy of Zhen Lei.

2.	Fix late wakeup when flush of bypass cblist happens, courtesy of
	"Joel Fernandes (Google)".

3.	Fix missing nocb gp wake on rcu_barrier(), courtesy of Frederic
	Weisbecker.

4.	Make call_rcu() lazy to save power, courtesy of "Joel Fernandes
	(Google)".

5.	Refactor code a bit in rcu_nocb_do_flush_bypass(), courtesy of
	"Joel Fernandes (Google)".

6.	Shrinker for lazy rcu, courtesy of Vineeth Pillai.

7.	Add laziness and kfree tests, courtesy of "Joel Fernandes
	(Google)".

8.	percpu-refcount: Use call_rcu_flush() for atomic switch, courtesy
	of "Joel Fernandes (Google)".

9.	Use call_rcu_flush() instead of call_rcu, courtesy of "Joel
	Fernandes (Google)".

10.	Use call_rcu_flush() for async reader test, courtesy of "Joel
	Fernandes (Google)".

11.	Use call_rcu_flush() where needed, courtesy of "Joel Fernandes
	(Google)".

12.	scsi/scsi_error: Use call_rcu_flush() instead of call_rcu(),
	courtesy of Uladzislau Rezki.

13.	Make queue_rcu_work() use call_rcu_flush(), courtesy of Uladzislau
	Rezki.

14.	Use call_rcu_flush() instead of call_rcu(), courtesy of "Joel
	Fernandes (Google)".

						Thanx, Paul

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

 b/drivers/scsi/scsi_error.c |    2 
 b/include/linux/rcupdate.h  |    9 +
 b/kernel/rcu/Kconfig        |    8 +
 b/kernel/rcu/rcu.h          |    8 +
 b/kernel/rcu/rcuscale.c     |   68 +++++++++++-
 b/kernel/rcu/rcutorture.c   |   16 +-
 b/kernel/rcu/sync.c         |    2 
 b/kernel/rcu/tiny.c         |    2 
 b/kernel/rcu/tree.c         |   11 +
 b/kernel/rcu/tree.h         |    1 
 b/kernel/rcu/tree_exp.h     |    2 
 b/kernel/rcu/tree_nocb.h    |   34 +-----
 b/kernel/workqueue.c        |    2 
 b/lib/percpu-refcount.c     |    3 
 b/net/rxrpc/conn_object.c   |    2 
 kernel/rcu/rcuscale.c       |    2 
 kernel/rcu/tree.c           |  129 +++++++++++++++--------
 kernel/rcu/tree.h           |   11 +
 kernel/rcu/tree_nocb.h      |  243 ++++++++++++++++++++++++++++++++++++--------
 19 files changed, 424 insertions(+), 131 deletions(-)

             reply	other threads:[~2022-10-19 22:51 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-19 22:51 Paul E. McKenney [this message]
2022-10-19 22:51 ` [PATCH rcu 01/14] rcu: Simplify rcu_init_nohz() cpumask handling Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 02/14] rcu: Fix late wakeup when flush of bypass cblist happens Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 03/14] rcu: Fix missing nocb gp wake on rcu_barrier() Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 04/14] rcu: Make call_rcu() lazy to save power Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 05/14] rcu: Refactor code a bit in rcu_nocb_do_flush_bypass() Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 06/14] rcu: Shrinker for lazy rcu Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 07/14] rcuscale: Add laziness and kfree tests Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 08/14] percpu-refcount: Use call_rcu_flush() for atomic switch Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 09/14] rcu/sync: Use call_rcu_flush() instead of call_rcu Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 10/14] rcu/rcuscale: Use call_rcu_flush() for async reader test Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 11/14] rcu/rcutorture: Use call_rcu_flush() where needed Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 12/14] scsi/scsi_error: Use call_rcu_flush() instead of call_rcu() Paul E. McKenney
2022-10-19 22:51 ` [PATCH rcu 13/14] workqueue: Make queue_rcu_work() use call_rcu_flush() Paul E. McKenney
2022-10-24  0:36   ` Joel Fernandes
2022-10-24  3:15     ` Paul E. McKenney
2022-10-24 10:49       ` Uladzislau Rezki
2022-10-24 12:23         ` Uladzislau Rezki
2022-10-24 14:31           ` Joel Fernandes
2022-10-24 15:39             ` Paul E. McKenney
2022-10-24 16:25               ` Uladzislau Rezki
2022-10-24 16:48                 ` Paul E. McKenney
2022-10-24 16:55                   ` Uladzislau Rezki
2022-10-24 17:08                     ` Uladzislau Rezki
2022-10-24 17:20                       ` Joel Fernandes
2022-10-24 17:35                         ` Paul E. McKenney
2022-10-24 20:12                           ` Joel Fernandes
2022-10-24 20:16                             ` Joel Fernandes
2022-10-25 10:48                               ` Uladzislau Rezki
2022-10-25 15:05                                 ` Joel Fernandes
2022-10-26 20:35                                   ` Uladzislau Rezki
2022-10-24 20:19                             ` Paul E. McKenney
2022-10-24 20:26                               ` Joel Fernandes
2022-10-24 17:40                         ` Uladzislau Rezki
2022-10-24 20:08                           ` Joel Fernandes
2022-10-25 10:47                             ` Uladzislau Rezki
2022-10-28 21:23                   ` Joel Fernandes
2022-10-28 21:42                     ` Joel Fernandes
2022-10-31 13:21                     ` Uladzislau Rezki
2022-10-31 13:37                       ` Joel Fernandes
2022-10-31 18:15                       ` Joel Fernandes
2022-11-01  4:49                         ` Uladzislau Rezki
2022-10-24 16:54                 ` Joel Fernandes
2022-10-19 22:51 ` [PATCH rcu 14/14] rxrpc: Use call_rcu_flush() instead of call_rcu() Paul E. McKenney

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