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| author | Paul E. McKenney <paulmck@kernel.org> | 2020-09-03 09:47:42 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-09-03 09:47:42 -0700 |
| commit | 7fbe67e46aab13f99d551ab04a1168a7d58cdae9 (patch) | |
| tree | 8feb62912b645adcc5bccaadb0b81d0674430c3d /kernel/rcu/Kconfig.debug | |
| parent | f511ce1424e5f3c32619eb0258afa8abd38fe3cc (diff) | |
| parent | cfeac3977ab4b6222a01f79997739d2367a8cc94 (diff) | |
Merge branch 'strictgp.2020.08.24a' into HEAD
strictgp.2020.08.24a: Strict grace periods for KASAN testing.
Diffstat (limited to 'kernel/rcu/Kconfig.debug')
| -rw-r--r-- | kernel/rcu/Kconfig.debug | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/rcu/Kconfig.debug b/kernel/rcu/Kconfig.debug index 5cb175df6ece..1942c1f1bb65 100644 --- a/kernel/rcu/Kconfig.debug +++ b/kernel/rcu/Kconfig.debug @@ -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" |