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

Paul E. McKenney
2024-06-04T22:23:49Z

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(-)