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 TORTURE_TEST 12 tristate 13 default n 14 15config 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 32config 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 49config 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 60config 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 72config 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 83endmenu # "RCU Debugging" 84