[PATCH rcu 0/12] Miscellaneous fixes for v5.20

Paul E. McKenney
2022-06-20T22:20:27Z

Hello!

This series contains miscellaneous fixes:

1. Decrease FQS scan wait time in case of callback overloading.

2. Avoid tracing a few functions executed in stop machine, courtesy
of Patrick Wang.

3. Add rnp->cbovldmask check in rcutree_migrate_callbacks(),
courtesy of Zqiang.

4. Immediately boost preempted readers for strict grace periods,
courtesy of Zqiang.

5. Forbid RCU_STRICT_GRACE_PERIOD in TINY_RCU kernels.

6. locking/csd_lock: Change csdlock_debug from early_param to
__setup, courtesy of Chen Zhongjin.

7. tiny: Record kvfree_call_rcu() call stack for KASAN, courtesy
of Johannes Berg.

8. Cleanup RCU urgency state for offline CPU, courtesy of Zqiang.

9. Remove useless monitor_todo flag, courtesy of "Joel Fernandes
(Google)".

10. Initialize first_gp_fqs at declaration in rcu_gp_fqs().

11. Add comment to describe GP-done condition in fqs loop, courtesy
of Neeraj Upadhyay.

12. Block less aggressively for expedited grace periods.

Thanx, Paul

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

b/include/linux/rcutiny.h | 11 +++++++++-
b/kernel/rcu/Kconfig.debug | 2 -
b/kernel/rcu/srcutree.c | 20 ++++++++++++------
b/kernel/rcu/tiny.c | 14 +++++++++++++
b/kernel/rcu/tree.c | 5 ++++
b/kernel/rcu/tree_plugin.h | 6 ++---
b/kernel/smp.c | 4 +--
kernel/rcu/tree.c | 48 ++++++++++++++++++++++++++-------------------
kernel/rcu/tree_plugin.h | 3 +-
9 files changed, 78 insertions(+), 35 deletions(-)