Messages in this thread | | | Date | Wed, 19 Oct 2022 15:51:38 -0700 | From | "Paul E. McKenney" <> | Subject | [PATCH rcu 0/14] Lazy call_rcu() updates for v6.2 |
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Hello!
This series provides energy efficiency for nearly-idle systems by making call_rcu() more lazy. Several NOCB changes come along for the ride:
1. Simplify rcu_init_nohz() cpumask handling, courtesy of Zhen Lei.
2. Fix late wakeup when flush of bypass cblist happens, courtesy of "Joel Fernandes (Google)".
3. Fix missing nocb gp wake on rcu_barrier(), courtesy of Frederic Weisbecker.
4. Make call_rcu() lazy to save power, courtesy of "Joel Fernandes (Google)".
5. Refactor code a bit in rcu_nocb_do_flush_bypass(), courtesy of "Joel Fernandes (Google)".
6. Shrinker for lazy rcu, courtesy of Vineeth Pillai.
7. Add laziness and kfree tests, courtesy of "Joel Fernandes (Google)".
8. percpu-refcount: Use call_rcu_flush() for atomic switch, courtesy of "Joel Fernandes (Google)".
9. Use call_rcu_flush() instead of call_rcu, courtesy of "Joel Fernandes (Google)".
10. Use call_rcu_flush() for async reader test, courtesy of "Joel Fernandes (Google)".
11. Use call_rcu_flush() where needed, courtesy of "Joel Fernandes (Google)".
12. scsi/scsi_error: Use call_rcu_flush() instead of call_rcu(), courtesy of Uladzislau Rezki.
13. Make queue_rcu_work() use call_rcu_flush(), courtesy of Uladzislau Rezki.
14. Use call_rcu_flush() instead of call_rcu(), courtesy of "Joel Fernandes (Google)".
Thanx, Paul
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b/drivers/scsi/scsi_error.c | 2 b/include/linux/rcupdate.h | 9 + b/kernel/rcu/Kconfig | 8 + b/kernel/rcu/rcu.h | 8 + b/kernel/rcu/rcuscale.c | 68 +++++++++++- b/kernel/rcu/rcutorture.c | 16 +- b/kernel/rcu/sync.c | 2 b/kernel/rcu/tiny.c | 2 b/kernel/rcu/tree.c | 11 + b/kernel/rcu/tree.h | 1 b/kernel/rcu/tree_exp.h | 2 b/kernel/rcu/tree_nocb.h | 34 +----- b/kernel/workqueue.c | 2 b/lib/percpu-refcount.c | 3 b/net/rxrpc/conn_object.c | 2 kernel/rcu/rcuscale.c | 2 kernel/rcu/tree.c | 129 +++++++++++++++-------- kernel/rcu/tree.h | 11 + kernel/rcu/tree_nocb.h | 243 ++++++++++++++++++++++++++++++++++++-------- 19 files changed, 424 insertions(+), 131 deletions(-)
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