kernel/rcu/Kconfig.debug

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