Hello! This series provides updates for RCU expedited grace periods, most notably 7/7 fixing a low-probability grace-period hang. 1. Ignore rdp.cpu_no_qs.b.exp on preemptible RCU's rcu_qs(), courtesy of Frederic Weisbecker. 2. Move rcu_data.cpu_no_qs.b.exp reset to rcu_export_exp_rdp(), courtesy of Frederic Weisbecker. 3. Remove rcu_data.exp_deferred_qs and convert to rcu_data.cpu no_qs.b.exp, courtesy of Frederic Weisbecker. 4. Mark sync_sched_exp_online_cleanup() ->cpu_no_qs.b.exp load. 5. Prevent expedited GP from enabling tick on offline CPU. 6. Make idle entry report expedited quiescent states. 7. Mark current CPU as exp-QS in IPI loop second pass, courtesy of Frederic Weisbecker. Thanx, Paul ------------------------------------------------------------------------ b/kernel/rcu/tree.c | 2 +- b/kernel/rcu/tree.h | 1 - b/kernel/rcu/tree_exp.h | 1 + b/kernel/rcu/tree_plugin.h | 6 +++++- kernel/rcu/tree_exp.h | 13 ++++++++----- kernel/rcu/tree_plugin.h | 31 ++++++++++++++++++++----------- 6 files changed, 35 insertions(+), 19 deletions(-)
