移去rt

hc

2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/kernel/rcu/Kconfig.debug
..
..
@@ -1,3 +1,4 @@
1
+# SPDX-License-Identifier: GPL-2.0-only
1
2
 #
2
3
 # RCU-related debugging configuration options
3
4
 #
..
..
@@ -7,16 +8,29 @@
7
8
 config PROVE_RCU
8
9
 	def_bool PROVE_LOCKING
9
10
 
11
+config 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
+
10
22
 config TORTURE_TEST
11
23
 	tristate
12
24
 	default n
13
25
 
14
-config RCU_PERF_TEST
26
+config RCU_SCALE_TEST
15
27
 	tristate "performance tests for RCU"
16
28
 	depends on DEBUG_KERNEL
17
29
 	select TORTURE_TEST
18
30
 	select SRCU
19
31
 	select TASKS_RCU
32
+	select TASKS_RUDE_RCU
33
+	select TASKS_TRACE_RCU
20
34
 	default n
21
35
 	help
22
36
 	  This option provides a kernel module that runs performance
..
..
@@ -34,6 +48,8 @@
34
48
 	select TORTURE_TEST
35
49
 	select SRCU
36
50
 	select TASKS_RCU
51
+	select TASKS_RUDE_RCU
52
+	select TASKS_TRACE_RCU
37
53
 	default n
38
54
 	help
39
55
 	  This option provides a kernel module that runs torture tests
..
..
@@ -43,6 +59,25 @@
43
59
 	  Say Y here if you want RCU torture tests to be built into
44
60
 	  the kernel.
45
61
 	  Say M if you want the RCU torture tests to build as a module.
62
+	  Say N if you are unsure.
63
+
64
+config RCU_REF_SCALE_TEST
65
+	tristate "Scalability tests for read-side synchronization (RCU and others)"
66
+	depends on DEBUG_KERNEL
67
+	select TORTURE_TEST
68
+	select SRCU
69
+	select TASKS_RCU
70
+	select TASKS_RUDE_RCU
71
+	select TASKS_TRACE_RCU
72
+	default n
73
+	help
74
+	  This option provides a kernel module that runs performance tests
75
+	  useful comparing RCU with various read-side synchronization mechanisms.
76
+	  The kernel module may be built after the fact on the running kernel to be
77
+	  tested, if desired.
78
+
79
+	  Say Y here if you want these performance tests built into the kernel.
80
+	  Say M if you want to build it as a module instead.
46
81
 	  Say N if you are unsure.
47
82
 
48
83
 config RCU_CPU_STALL_TIMEOUT
..
..
@@ -102,4 +137,19 @@
102
137
 	  Say N here if you need ultimate kernel/user switch latencies
103
138
 	  Say Y if you are unsure
104
139
 
140
+config RCU_STRICT_GRACE_PERIOD
141
+	bool "Provide debug RCU implementation with short grace periods"
142
+	depends on DEBUG_KERNEL && RCU_EXPERT
143
+	default n
144
+	select PREEMPT_COUNT if PREEMPT=n
145
+	help
146
+	  Select this option to build an RCU variant that is strict about
147
+	  grace periods, making them as short as it can.  This limits
148
+	  scalability, destroys real-time response, degrades battery
149
+	  lifetime and kills performance.  Don't try this on large
150
+	  machines, as in systems with more than about 10 or 20 CPUs.
151
+	  But in conjunction with tools like KASAN, it can be helpful
152
+	  when looking for certain types of RCU usage bugs, for example,
153
+	  too-short RCU read-side critical sections.
154
+
105
155
 endmenu # "RCU Debugging"