linux-kernel - [PATCH rcu 0/9] Miscellaneous fixes for v6.11

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Date: Tue, 4 Jun 2024 15:23:48 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com, rostedt@...dmis.org
Subject: [PATCH rcu 0/9] Miscellaneous fixes for v6.11

Hello!

This series provides miscellaneous fixes:

1.	Add lockdep_assert_in_rcu_read_lock() and friends.

2.	Reduce synchronize_rcu() delays when all wait heads are in use,
	courtesy of Neeraj Upadhyay.

3.	rcu/tree: Reduce wake up for synchronize_rcu() common case,
	courtesy of "Joel Fernandes (Google)".

4.	Disable interrupts directly in rcu_gp_init().

5.	Disable interrupts directly in srcu_gp_end().

6.	Add rcutree.nocb_patience_delay to reduce nohz_full OS jitter.

7.	MAINTAINERS: Add Uladzislau Rezki as RCU maintainer.

8.	Eliminate lockless accesses to rcu_sync->gp_count, courtesy of
	Oleg Nesterov.

9.	Fix rcu_barrier() VS post CPUHP_TEARDOWN_CPU invocation, courtesy
	of Frederic Weisbecker.

						Thanx, Paul

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

 b/Documentation/admin-guide/kernel-parameters.txt |    8 ++
 b/MAINTAINERS                                     |    1 
 b/include/linux/rcupdate.h                        |   60 +++++++++++++++++++++
 b/kernel/rcu/srcutree.c                           |    5 -
 b/kernel/rcu/sync.c                               |   12 +---
 b/kernel/rcu/tree.c                               |   40 ++++++++------
 b/kernel/rcu/tree.h                               |    1 
 b/kernel/rcu/tree_plugin.h                        |   10 +++
 kernel/rcu/tree.c                                 |   61 +++++++++++++++++-----
 9 files changed, 157 insertions(+), 41 deletions(-)