diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/Kconfig.preempt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/Kconfig.preempt b/kernel/Kconfig.preempt index 0669b70fa6a..9fdba03dc1f 100644 --- a/kernel/Kconfig.preempt +++ b/kernel/Kconfig.preempt @@ -52,8 +52,23 @@ config PREEMPT endchoice +config PREEMPT_RCU + bool "Preemptible RCU" + depends on PREEMPT + default n + help + This option reduces the latency of the kernel by making certain + RCU sections preemptible. Normally RCU code is non-preemptible, if + this option is selected then read-only RCU sections become + preemptible. This helps latency, but may expose bugs due to + now-naive assumptions about each RCU read-side critical section + remaining on a given CPU through its execution. + + Say N if you are unsure. + config RCU_TRACE bool "Enable tracing for RCU - currently stats in debugfs" + depends on PREEMPT_RCU select DEBUG_FS default y help |