1 # SPDX-License-Identifier: GPL-2.0-only 1 # SPDX-License-Identifier: GPL-2.0-only
2 2
3 menu "Data Access Monitoring" 3 menu "Data Access Monitoring"
4 4
5 config DAMON 5 config DAMON
6 bool "DAMON: Data Access Monitoring Fr 6 bool "DAMON: Data Access Monitoring Framework"
7 help 7 help
8 This builds a framework that allows 8 This builds a framework that allows kernel subsystems to monitor
9 access frequency of each memory regi 9 access frequency of each memory region. The information can be useful
10 for performance-centric DRAM level m 10 for performance-centric DRAM level memory management.
11 11
12 See https://www.kernel.org/doc/html/ 12 See https://www.kernel.org/doc/html/latest/mm/damon/index.html for
13 more information. 13 more information.
14 14
15 config DAMON_KUNIT_TEST 15 config DAMON_KUNIT_TEST
16 bool "Test for damon" if !KUNIT_ALL_TE 16 bool "Test for damon" if !KUNIT_ALL_TESTS
17 depends on DAMON && KUNIT=y 17 depends on DAMON && KUNIT=y
18 default KUNIT_ALL_TESTS 18 default KUNIT_ALL_TESTS
19 help 19 help
20 This builds the DAMON Kunit test sui 20 This builds the DAMON Kunit test suite.
21 21
22 For more information on KUnit and un 22 For more information on KUnit and unit tests in general, please refer
23 to the KUnit documentation. 23 to the KUnit documentation.
24 24
25 If unsure, say N. 25 If unsure, say N.
26 26
27 config DAMON_VADDR 27 config DAMON_VADDR
28 bool "Data access monitoring operation 28 bool "Data access monitoring operations for virtual address spaces"
29 depends on DAMON && MMU 29 depends on DAMON && MMU
30 select PAGE_IDLE_FLAG 30 select PAGE_IDLE_FLAG
31 help 31 help
32 This builds the default data access 32 This builds the default data access monitoring operations for DAMON
33 that work for virtual address spaces 33 that work for virtual address spaces.
34 34
35 config DAMON_PADDR 35 config DAMON_PADDR
36 bool "Data access monitoring operation 36 bool "Data access monitoring operations for the physical address space"
37 depends on DAMON && MMU 37 depends on DAMON && MMU
38 select PAGE_IDLE_FLAG 38 select PAGE_IDLE_FLAG
39 help 39 help
40 This builds the default data access 40 This builds the default data access monitoring operations for DAMON
41 that works for the physical address 41 that works for the physical address space.
42 42
43 config DAMON_VADDR_KUNIT_TEST 43 config DAMON_VADDR_KUNIT_TEST
44 bool "Test for DAMON operations" if !K 44 bool "Test for DAMON operations" if !KUNIT_ALL_TESTS
45 depends on DAMON_VADDR && KUNIT=y 45 depends on DAMON_VADDR && KUNIT=y
46 default KUNIT_ALL_TESTS 46 default KUNIT_ALL_TESTS
47 help 47 help
48 This builds the DAMON virtual addres 48 This builds the DAMON virtual addresses operations Kunit test suite.
49 49
50 For more information on KUnit and un 50 For more information on KUnit and unit tests in general, please refer
51 to the KUnit documentation. 51 to the KUnit documentation.
52 52
53 If unsure, say N. 53 If unsure, say N.
54 54
55 config DAMON_SYSFS 55 config DAMON_SYSFS
56 bool "DAMON sysfs interface" 56 bool "DAMON sysfs interface"
57 depends on DAMON && SYSFS 57 depends on DAMON && SYSFS
58 help 58 help
59 This builds the sysfs interface for 59 This builds the sysfs interface for DAMON. The user space can use
60 the interface for arbitrary data acc 60 the interface for arbitrary data access monitoring.
61 61
62 config DAMON_SYSFS_KUNIT_TEST 62 config DAMON_SYSFS_KUNIT_TEST
63 bool "Test for damon debugfs interface 63 bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
64 depends on DAMON_SYSFS && KUNIT=y 64 depends on DAMON_SYSFS && KUNIT=y
65 default KUNIT_ALL_TESTS 65 default KUNIT_ALL_TESTS
66 help 66 help
67 This builds the DAMON sysfs interfac 67 This builds the DAMON sysfs interface Kunit test suite.
68 68
69 For more information on KUnit and un 69 For more information on KUnit and unit tests in general, please refer
70 to the KUnit documentation. 70 to the KUnit documentation.
71 71
72 If unsure, say N. 72 If unsure, say N.
73 73
74 config DAMON_DBGFS_DEPRECATED 74 config DAMON_DBGFS_DEPRECATED
75 bool "DAMON debugfs interface (DEPRECA 75 bool "DAMON debugfs interface (DEPRECATED!)"
76 depends on DAMON_VADDR && DAMON_PADDR 76 depends on DAMON_VADDR && DAMON_PADDR && DEBUG_FS
77 help 77 help
78 This builds the debugfs interface fo 78 This builds the debugfs interface for DAMON. The user space admins
79 can use the interface for arbitrary 79 can use the interface for arbitrary data access monitoring.
80 80
81 If unsure, say N. 81 If unsure, say N.
82 82
83 This is deprecated, so users should 83 This is deprecated, so users should move to the sysfs interface
84 (DAMON_SYSFS). If you depend on thi 84 (DAMON_SYSFS). If you depend on this and cannot move, please report
85 your usecase to damon@lists.linux.de 85 your usecase to damon@lists.linux.dev and linux-mm@kvack.org.
86 86
87 config DAMON_DBGFS 87 config DAMON_DBGFS
88 bool 88 bool
89 default y 89 default y
90 depends on DAMON_DBGFS_DEPRECATED 90 depends on DAMON_DBGFS_DEPRECATED
91 91
92 config DAMON_DBGFS_KUNIT_TEST 92 config DAMON_DBGFS_KUNIT_TEST
93 bool "Test for damon debugfs interface 93 bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
94 depends on DAMON_DBGFS && KUNIT=y 94 depends on DAMON_DBGFS && KUNIT=y
95 default KUNIT_ALL_TESTS 95 default KUNIT_ALL_TESTS
96 help 96 help
97 This builds the DAMON debugfs interf 97 This builds the DAMON debugfs interface Kunit test suite.
98 98
99 For more information on KUnit and un 99 For more information on KUnit and unit tests in general, please refer
100 to the KUnit documentation. 100 to the KUnit documentation.
101 101
102 If unsure, say N. 102 If unsure, say N.
103 103
104 config DAMON_RECLAIM 104 config DAMON_RECLAIM
105 bool "Build DAMON-based reclaim (DAMON 105 bool "Build DAMON-based reclaim (DAMON_RECLAIM)"
106 depends on DAMON_PADDR 106 depends on DAMON_PADDR
107 help 107 help
108 This builds the DAMON-based reclamat 108 This builds the DAMON-based reclamation subsystem. It finds pages
109 that not accessed for a long time (c 109 that not accessed for a long time (cold) using DAMON and reclaim
110 those. 110 those.
111 111
112 This is suggested to be used as a pr 112 This is suggested to be used as a proactive and lightweight
113 reclamation under light memory press 113 reclamation under light memory pressure, while the traditional page
114 scanning-based reclamation is used f 114 scanning-based reclamation is used for heavy pressure.
115 115
116 config DAMON_LRU_SORT 116 config DAMON_LRU_SORT
117 bool "Build DAMON-based LRU-lists sort 117 bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"
118 depends on DAMON_PADDR 118 depends on DAMON_PADDR
119 help 119 help
120 This builds the DAMON-based LRU-list 120 This builds the DAMON-based LRU-lists sorting subsystem. It tries to
121 protect frequently accessed (hot) pa 121 protect frequently accessed (hot) pages while rarely accessed (cold)
122 pages reclaimed first under memory p 122 pages reclaimed first under memory pressure.
123 123
124 endmenu 124 endmenu
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.