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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-03-17 16:16:45 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-20 16:53:19 -0700 |
| commit | 4c3f7b0e1e880e892d4bc4f50bf627b251b6e2cc (patch) | |
| tree | 8816013a3a4b6a2d4c12d922f7b99ef3da2b8516 /kernel/rcu/Kconfig | |
| parent | 3b6e1dd42317ec366dab3205f99280e2ab1ad85a (diff) | |
| download | linux-4c3f7b0e1e880e892d4bc4f50bf627b251b6e2cc.tar.bz2 | |
rcutorture: Allow rcutorture without RCU Tasks Rude
Unless a kernel builds rcutorture, whether built-in or as a module, that
kernel is also built with CONFIG_TASKS_RUDE_RCU, whether anything else
needs Tasks Rude RCU or not. This unnecessarily increases kernel size.
This commit therefore decouples the presence of rcutorture from the
presence of RCU Tasks Rude.
However, there is a need to select CONFIG_TASKS_RUDE_RCU for testing
purposes. Except that casual users must not be bothered with
questions -- for them, this needs to be fully automated. There is
thus a CONFIG_FORCE_TASKS_RUDE_RCU that selects CONFIG_TASKS_RUDE_RCU,
is user-selectable, but which depends on CONFIG_RCU_EXPERT.
[ paulmck: Apply kernel test robot feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/rcu/Kconfig')
| -rw-r--r-- | kernel/rcu/Kconfig | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 8eac165db09f..65d45c00fd1b 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -93,15 +93,22 @@ config TASKS_RCU default n select IRQ_WORK +config FORCE_TASKS_RUDE_RCU + bool "Force selection of Tasks Rude RCU" + depends on RCU_EXPERT + select TASKS_RUDE_RCU + default n + help + This option force-enables a task-based RCU implementation + that uses only context switch (including preemption) and + user-mode execution as quiescent states. It forces IPIs and + context switches on all online CPUs, including idle ones, + so use with caution. Not for manual selection in most cases. + config TASKS_RUDE_RCU - def_bool 0 + bool + default n select IRQ_WORK - help - This option enables a task-based RCU implementation that uses - only context switch (including preemption) and user-mode - execution as quiescent states. It forces IPIs and context - switches on all online CPUs, including idle ones, so use - with caution. config FORCE_TASKS_TRACE_RCU bool "Force selection of Tasks Trace RCU" |