[PATCH v3 0/7] Reduce synchronize_rcu() latency(V3)

[Uladzislau Rezki (Sony)]

This is V3.

V2 -> V3:
 - use dummy wait node to eliminate cache misses during a full llist
   scan to obtain a tail node;
 - add CONFIG_RCU_SR_NORMAL_DEBUG_GP Kconfig for a GP incomplete debug;
 - move synchronize_rcu()'s main control data under the rcu_state struct;
 - add rcutree.rcu_normal_wake_from_gp parameter description to the
   kernel-parameters.txt file;
 - split functionality into several patches.

V2: https://lore.kernel.org/all/20231030131254.488186-1-urezki@xxxxxxxxx/T/
V1: https://lore.kernel.org/lkml/20231025140915.590390-1-urezki@xxxxxxxxx/T/

Neeraj Upadhyay (1):
  rcu: Improve handling of synchronize_rcu() users

Uladzislau Rezki (Sony) (6):
  rcu: Reduce synchronize_rcu() latency
  rcu: Add a trace event for synchronize_rcu_normal()
  doc: Add rcutree.rcu_normal_wake_from_gp to kernel-parameters.txt
  rcu: Support direct wake-up of synchronize_rcu() users
  rcu: Move sync related data to rcu_state structure
  rcu: Add CONFIG_RCU_SR_NORMAL_DEBUG_GP

 .../admin-guide/kernel-parameters.txt         |  14 +
 include/trace/events/rcu.h                    |  27 ++
 kernel/rcu/Kconfig.debug                      |  12 +
 kernel/rcu/tree.c                             | 354 +++++++++++++++++-
 kernel/rcu/tree.h                             |  19 +
 kernel/rcu/tree_exp.h                         |   2 +-
 6 files changed, 426 insertions(+), 2 deletions(-)

-- 
2.39.2