Messages in this thread | | | Date | Wed, 29 Aug 2018 16:00:35 -0700 | From | "Paul E. McKenney" <> | Subject | [PATCH tip/core/rcu 0/10] Forward-progress changes for v4.20/v5.0 |
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Hello!
This series includes changes that improve RCU's forward-progress guarantees for normal grace periods, with a few stray RCU-consolidation cleanups thrown in for good measure.
1. Make need_resched() respond to urgent RCU-QS needs.
2. Provide improved interrupt-from-idle check in rcu_check_callbacks().
3. Make rcutorture dump out the reader protection sequence when an RCU failures or close calls occurs.
4. Motivate Tiny RCU forward progress.
5. Eliminate ->rcu_qs_ctr from the rcu_dynticks structure on account of its no longer being used. And let that be a lesson to the rest of that structure's fields!!!
6. Provide functions for determining if call_rcu() has been invoked for debugging purposes by the users of call_rcu().
7. Compute jiffies_till_sched_qs from other kernel parameters, because one size simply does not fit all.
8. More aggressively enlist scheduler aid for nohz_full CPUs. After all, they might never see a scheduler-clock interrupt.
9. Avoid resched_cpu() when rescheduling the current CPU.
10. Convert "1UL << x" to "BIT(x)" to save a few characters.
Thanx, Paul
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Documentation/admin-guide/kernel-parameters.txt | 9 + include/linux/rcupdate.h | 40 +++++ include/trace/events/rcu.h | 5 kernel/rcu/rcu.h | 5 kernel/rcu/rcutorture.c | 119 +++++++++++++--- kernel/rcu/tiny.c | 6 kernel/rcu/tree.c | 171 ++++++++++++++---------- kernel/rcu/tree.h | 6 kernel/rcu/tree_exp.h | 17 +- kernel/rcu/tree_plugin.h | 14 + 10 files changed, 280 insertions(+), 112 deletions(-)
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