diff options
| author | Paul Mackerras <paulus@samba.org> | 2008-03-13 15:26:33 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-03-13 15:26:33 +1100 |
| commit | bed04a4413376265746053be2a9cfbfc80c98ec9 (patch) | |
| tree | 8f582294a655f70496cd08aedeb86de31dbad140 /kernel/Kconfig.preempt | |
| parent | e37c772e36a7943b2e0bd8f48312e78474c0df15 (diff) | |
| parent | c463be3520065ef8c05e3cbdf946c69604e91ceb (diff) | |
Merge branch 'linux-2.6'
Diffstat (limited to 'kernel/Kconfig.preempt')
| -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 |