redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

rcu-tasks: Use context-switch hook for PREEMPT=y kernels

Browse source 
Currently, the PREEMPT=y version of rcu_note_context_switch() does not
invoke rcu_tasks_qs(), and we need it to in order to keep RCU Tasks
Trace's IPIs down to a dull roar.  This commit therefore enables this
hook.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-03-16 15:22:44 -07:00
parent ac3caf8274
commit 66777e5821
1 changed files with 2 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
kernel/rcu/tree_plugin.h
View file

@ -331,6 +331,8 @@ void rcu_note_context_switch(bool preempt)
rcu_qs();
if (rdp->exp_deferred_qs)
rcu_report_exp_rdp(rdp);
if (!preempt)
rcu_tasks_qs(current);
trace_rcu_utilization(TPS("End context switch"));
}
EXPORT_SYMBOL_GPL(rcu_note_context_switch);