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| author | Paul E. McKenney <paulmck@kernel.org> | 2022-03-17 15:18:27 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-04-20 16:53:19 -0700 |
| commit | 3b6e1dd42317ec366dab3205f99280e2ab1ad85a (patch) | |
| tree | d755da20405895b062ae9a3a8a85da2b5cc35455 /kernel/rcu/Kconfig | |
| parent | 40c1278aa7cd51d4f8627f7adc66aa73e01aff81 (diff) | |
| download | linux-3b6e1dd42317ec366dab3205f99280e2ab1ad85a.tar.bz2 | |
rcutorture: Allow rcutorture without RCU Tasks
Currently, a CONFIG_PREEMPT_NONE=y kernel substitutes normal RCU for
RCU Tasks. Unless that kernel builds rcutorture, whether built-in or as
a module, in which case RCU Tasks is (unnecessarily) used. This both
increases kernel size and increases the complexity of certain tracing
operations. This commit therefore decouples the presence of rcutorture
from the presence of RCU Tasks.
However, there is a need to select CONFIG_TASKS_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_RCU
that selects CONFIG_TASKS_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 | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/kernel/rcu/Kconfig b/kernel/rcu/Kconfig index 2befd328e6a0..8eac165db09f 100644 --- a/kernel/rcu/Kconfig +++ b/kernel/rcu/Kconfig @@ -77,13 +77,21 @@ config TASKS_RCU_GENERIC This option enables generic infrastructure code supporting task-based RCU implementations. Not for manual selection. +config FORCE_TASKS_RCU + bool "Force selection of TASKS_RCU" + depends on RCU_EXPERT + select TASKS_RCU + default n + help + This option force-enables a task-based RCU implementation + that uses only voluntary context switch (not preemption!), + idle, and user-mode execution as quiescent states. Not for + manual selection in most cases. + config TASKS_RCU - def_bool 0 + bool + default n select IRQ_WORK - help - This option enables a task-based RCU implementation that uses - only voluntary context switch (not preemption!), idle, and - user-mode execution as quiescent states. Not for manual selection. config TASKS_RUDE_RCU def_bool 0 |