diff options
| author |   Paul E. McKenney <paulmck@kernel.org> | 2020-03-16 15:22:44 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-04-27 11:03:50 -0700 |
| commit | 66777e5821f6e672003fde697b8489402bb5aa98 (patch) | |
| tree | 9d5f442f267743812afceef07d1ab7c0b78056cc /kernel/rcu | |
| parent | rcu: Add comments marking transitions between RCU watching and not (diff) | |
| download | linux-dev-66777e5821f6e672003fde697b8489402bb5aa98.tar.xz linux-dev-66777e5821f6e672003fde697b8489402bb5aa98.zip | |
rcu-tasks: Use context-switch hook for PREEMPT=y kernels
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>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree_plugin.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree_plugin.h b/kernel/rcu/tree_plugin.h index 088e84e4578f..4f34c325dd90 100644 --- a/kernel/rcu/tree_plugin.h +++ b/kernel/rcu/tree_plugin.h @@ -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); |