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 select TASKS_RUDE_RCU 33 select TASKS_TRACE_RCU 34 default n 35 help 36 This option provides a kernel module that runs performance 37 tests on the RCU infrastructure. The kernel module may be built 38 after the fact on the running kernel to be tested, if desired. 39 40 Say Y here if you want RCU performance tests to be built into 41 the kernel. 42 Say M if you want the RCU performance tests to build as a module. 43 Say N if you are unsure. 44 45config RCU_TORTURE_TEST 46 tristate "torture tests for RCU" 47 depends on DEBUG_KERNEL 48 select TORTURE_TEST 49 select SRCU 50 select TASKS_RCU 51 select TASKS_RUDE_RCU 52 select TASKS_TRACE_RCU 53 default n 54 help 55 This option provides a kernel module that runs torture tests 56 on the RCU infrastructure. The kernel module may be built 57 after the fact on the running kernel to be tested, if desired. 58 59 Say Y here if you want RCU torture tests to be built into 60 the kernel. 61 Say M if you want the RCU torture tests to build as a module. 62 Say N if you are unsure. 63 64config RCU_CPU_STALL_TIMEOUT 65 int "RCU CPU stall timeout in seconds" 66 depends on RCU_STALL_COMMON 67 range 3 300 68 default 21 69 help 70 If a given RCU grace period extends more than the specified 71 number of seconds, a CPU stall warning is printed. If the 72 RCU grace period persists, additional CPU stall warnings are 73 printed at more widely spaced intervals. 74 75config RCU_TRACE 76 bool "Enable tracing for RCU" 77 depends on DEBUG_KERNEL 78 default y if TREE_RCU 79 select TRACE_CLOCK 80 help 81 This option enables additional tracepoints for ftrace-style 82 event tracing. 83 84 Say Y here if you want to enable RCU tracing 85 Say N if you are unsure. 86 87config RCU_EQS_DEBUG 88 bool "Provide debugging asserts for adding NO_HZ support to an arch" 89 depends on DEBUG_KERNEL 90 help 91 This option provides consistency checks in RCU's handling of 92 NO_HZ. These checks have proven quite helpful in detecting 93 bugs in arch-specific NO_HZ code. 94 95 Say N here if you need ultimate kernel/user switch latencies 96 Say Y if you are unsure 97 98endmenu # "RCU Debugging" 99