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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-11-04 18:14:52 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-11-04 18:14:52 +0100 |
| commit | 01be83eea08d6d9f9209843e2e084505fba4053f (patch) | |
| tree | 95b456e1ac40399fd5f55b57ae0936643bea1836 /kernel/rcu/Kconfig.debug | |
| parent | 45ff510517f3b1354a3d9c273ad5e5e8d08312cb (diff) | |
| parent | 9d820f68b2bdba5b2e7bf135123c3f57c5051d05 (diff) | |
| download | lwn-01be83eea08d6d9f9209843e2e084505fba4053f.tar.gz lwn-01be83eea08d6d9f9209843e2e084505fba4053f.zip | |
Merge branch 'core/urgent' into core/entry
Pick up the entry fix before further modifications.
Diffstat (limited to 'kernel/rcu/Kconfig.debug')
| -rw-r--r-- | kernel/rcu/Kconfig.debug | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug index 3cf6132a4bb9..1942c1f1bb65 100644 --- a/kernel/rcu/Kconfig.debug +++ b/kernel/rcu/Kconfig.debug @@ -23,7 +23,7 @@ config TORTURE_TEST tristate default n -config RCU_PERF_TEST +config RCU_SCALE_TEST tristate "performance tests for RCU" depends on DEBUG_KERNEL select TORTURE_TEST @@ -114,4 +114,19 @@ config RCU_EQS_DEBUG Say N here if you need ultimate kernel/user switch latencies Say Y if you are unsure +config RCU_STRICT_GRACE_PERIOD + bool "Provide debug RCU implementation with short grace periods" + depends on DEBUG_KERNEL && RCU_EXPERT + default n + select PREEMPT_COUNT if PREEMPT=n + help + Select this option to build an RCU variant that is strict about + grace periods, making them as short as it can. This limits + scalability, destroys real-time response, degrades battery + lifetime and kills performance. Don't try this on large + machines, as in systems with more than about 10 or 20 CPUs. + But in conjunction with tools like KASAN, it can be helpful + when looking for certain types of RCU usage bugs, for example, + too-short RCU read-side critical sections. + endmenu # "RCU Debugging" |