[PATCH rcu 00/11] Lazy Preempt changes for v6.15

From: Boqun Feng
Date: Mon Feb 24 2025 - 22:55:34 EST


Hi,

Please find the upcoming changes for CONFIG_PREEMPT_LAZY in RCU. The
changes can also be found at:

git://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git lazypreempt.2025.02.24a

Paul & Ankur, I put patch #7 and #8 (bug fixes in rcutorture) before
patch #9 (which is the one that enables non-preemptible RCU in
preemptible kernel), because I want to avoid introduce a bug in-between
a series, appreciate it if you can double check on this. Thanks!

Regards,
Boqun

Ankur Arora (7):
rcu: fix header guard for rcu_all_qs()
rcu: rename PREEMPT_AUTO to PREEMPT_LAZY
sched: update __cond_resched comment about RCU quiescent states
rcu: handle unstable rdp in rcu_read_unlock_strict()
rcu: handle quiescent states for PREEMPT_RCU=n, PREEMPT_COUNT=y
osnoise: provide quiescent states
rcu: limit PREEMPT_RCU configurations

Boqun Feng (1):
rcutorture: Update ->extendables check for lazy preemption

Paul E. McKenney (3):
rcutorture: Update rcutorture_one_extend_check() for lazy preemption
rcutorture: Make scenario TREE10 build CONFIG_PREEMPT_LAZY=y
rcutorture: Make scenario TREE07 build CONFIG_PREEMPT_LAZY=y

include/linux/rcupdate.h | 2 +-
include/linux/rcutree.h | 2 +-
include/linux/srcutiny.h | 2 +-
kernel/rcu/Kconfig | 4 +--
kernel/rcu/rcutorture.c | 26 ++++++++++++---
kernel/rcu/srcutiny.c | 14 ++++----
kernel/rcu/tree_plugin.h | 22 ++++++++++---
kernel/sched/core.c | 4 ++-
kernel/trace/trace_osnoise.c | 32 +++++++++----------
.../selftests/rcutorture/configs/rcu/TREE07 | 3 +-
.../selftests/rcutorture/configs/rcu/TREE10 | 3 +-
11 files changed, 73 insertions(+), 41 deletions(-)

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2.39.5 (Apple Git-154)