LXR linux/kernel/rcu/Kconfig.debug

   1# SPDX-License-Identifier: GPL-2.0-only
   2#
   3# RCU-related debugging configuration options
   4#
   5
   6menu "RCU Debugging"
   7
   8config PROVE_RCU
   9        def_bool PROVE_LOCKING
  10
  11config PROVE_RCU_LIST
  12        bool "RCU list lockdep debugging"
  13        depends on PROVE_RCU && RCU_EXPERT
  14        default n
  15        help
  16          Enable RCU lockdep checking for list usages. By default it is
  17          turned off since there are several list RCU users that still
  18          need to be converted to pass a lockdep expression. To prevent
  19          false-positive splats, we keep it default disabled but once all
  20          users are converted, we can remove this config option.
  21
  22config TORTURE_TEST
  23        tristate
  24        default n
  25
  26config RCU_PERF_TEST
  27        tristate "performance tests for RCU"
  28        depends on DEBUG_KERNEL
  29        select TORTURE_TEST
  30        select SRCU
  31        select TASKS_RCU
  32        default n
  33        help
  34          This option provides a kernel module that runs performance
  35          tests on the RCU infrastructure.  The kernel module may be built
  36          after the fact on the running kernel to be tested, if desired.
  37
  38          Say Y here if you want RCU performance tests to be built into
  39          the kernel.
  40          Say M if you want the RCU performance tests to build as a module.
  41          Say N if you are unsure.
  42
  43config RCU_TORTURE_TEST
  44        tristate "torture tests for RCU"
  45        depends on DEBUG_KERNEL
  46        select TORTURE_TEST
  47        select SRCU
  48        select TASKS_RCU
  49        default n
  50        help
  51          This option provides a kernel module that runs torture tests
  52          on the RCU infrastructure.  The kernel module may be built
  53          after the fact on the running kernel to be tested, if desired.
  54
  55          Say Y here if you want RCU torture tests to be built into
  56          the kernel.
  57          Say M if you want the RCU torture tests to build as a module.
  58          Say N if you are unsure.
  59
  60config RCU_CPU_STALL_TIMEOUT
  61        int "RCU CPU stall timeout in seconds"
  62        depends on RCU_STALL_COMMON
  63        range 3 300
  64        default 21
  65        help
  66          If a given RCU grace period extends more than the specified
  67          number of seconds, a CPU stall warning is printed.  If the
  68          RCU grace period persists, additional CPU stall warnings are
  69          printed at more widely spaced intervals.
  70
  71config RCU_TRACE
  72        bool "Enable tracing for RCU"
  73        depends on DEBUG_KERNEL
  74        default y if TREE_RCU
  75        select TRACE_CLOCK
  76        help
  77          This option enables additional tracepoints for ftrace-style
  78          event tracing.
  79
  80          Say Y here if you want to enable RCU tracing
  81          Say N if you are unsure.
  82
  83config RCU_EQS_DEBUG
  84        bool "Provide debugging asserts for adding NO_HZ support to an arch"
  85        depends on DEBUG_KERNEL
  86        help
  87          This option provides consistency checks in RCU's handling of
  88          NO_HZ.  These checks have proven quite helpful in detecting
  89          bugs in arch-specific NO_HZ code.
  90
  91          Say N here if you need ultimate kernel/user switch latencies
  92          Say Y if you are unsure
  93
  94endmenu # "RCU Debugging"
  95