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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2019-10-15 21:18:14 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2019-12-09 21:37:51 +0100 |
| commit | 90326f0521a88004194f88f1b597b54347482b5c (patch) | |
| tree | d9f297243f2aa6b07dac050789271ae4f2f244ce /kernel/rcu/Kconfig | |
| parent | rcu: Make PREEMPT_RCU be a modifier to TREE_RCU (diff) | |
| download | linux-90326f0521a88004194f88f1b597b54347482b5c.tar.xz linux-90326f0521a88004194f88f1b597b54347482b5c.zip | |
rcu: Use CONFIG_PREEMPTION where appropriate
The config option `CONFIG_PREEMPT' is used for the preemption model
"Low-Latency Desktop". The config option `CONFIG_PREEMPTION' is enabled
when kernel preemption is enabled which is true for the preemption model
`CONFIG_PREEMPT' and `CONFIG_PREEMPT_RT'.
Use `CONFIG_PREEMPTION' if it applies to both preemption models and not
just to `CONFIG_PREEMPT'.
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Josh Triplett <josh@joshtriplett.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Joel Fernandes <joel@joelfernandes.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: rcu@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/Kconfig')
| -rw-r--r-- | kernel/rcu/Kconfig | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 0303934e6ef0..1cc940fef17c 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -201,8 +201,8 @@ config RCU_NOCB_CPU specified at boot time by the rcu_nocbs parameter. For each such CPU, a kthread ("rcuox/N") will be created to invoke callbacks, where the "N" is the CPU being offloaded, and where - the "p" for RCU-preempt (PREEMPT kernels) and "s" for RCU-sched - (!PREEMPT kernels). Nothing prevents this kthread from running + the "p" for RCU-preempt (PREEMPTION kernels) and "s" for RCU-sched + (!PREEMPTION kernels). Nothing prevents this kthread from running on the specified CPUs, but (1) the kthreads may be preempted between each callback, and (2) affinity or cgroups can be used to force the kthreads to run on whatever set of CPUs is desired. |