diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-06-27 21:48:00 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-08-30 16:02:35 -0700 |
| commit | 27c744e32a9a4066daca0ee7496819bff78c1b37 (patch) | |
| tree | 227dc2ce4b056ad50fd0b3a9b8c03a873188ced6 /kernel/rcu/tree_plugin.h | |
| parent | c0335743c5d80233753d81a4c7d22b7437363a8f (diff) | |
rcu: Allow processing deferred QSes for exiting RCU-preempt readers
If an RCU-preempt read-side critical section is exiting, that is,
->rcu_read_lock_nesting is negative, then it is a good time to look
at the possibility of reporting deferred quiescent states. This
commit therefore updates the checks in rcu_preempt_need_deferred_qs()
to allow exiting critical sections to report deferred quiescent states.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree_plugin.h')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 542791361908..24c209676d20 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -602,7 +602,7 @@ static bool rcu_preempt_need_deferred_qs(struct task_struct *t) { return (this_cpu_ptr(&rcu_preempt_data)->deferred_qs || READ_ONCE(t->rcu_read_unlock_special.s)) && - !t->rcu_read_lock_nesting; + t->rcu_read_lock_nesting <= 0; } /* |