1# SPDX-License-Identifier: GPL-2.0-only
2
3menu "Data Access Monitoring"
4
5config DAMON
6	bool "DAMON: Data Access Monitoring Framework"
7	default y
8	help
9	  This builds a framework that allows kernel subsystems to monitor
10	  access frequency of each memory region. The information can be useful
11	  for performance-centric DRAM level memory management.
12
13	  See https://www.kernel.org/doc/html/latest/mm/damon/index.html for
14	  more information.
15
16config DAMON_KUNIT_TEST
17	bool "Test for damon" if !KUNIT_ALL_TESTS
18	depends on DAMON && KUNIT=y
19	default KUNIT_ALL_TESTS
20	help
21	  This builds the DAMON Kunit test suite.
22
23	  For more information on KUnit and unit tests in general, please refer
24	  to the KUnit documentation.
25
26	  If unsure, say N.
27
28config DAMON_VADDR
29	bool "Data access monitoring operations for virtual address spaces"
30	depends on DAMON && MMU
31	select PAGE_IDLE_FLAG
32	default DAMON
33	help
34	  This builds the default data access monitoring operations for DAMON
35	  that work for virtual address spaces.
36
37config DAMON_PADDR
38	bool "Data access monitoring operations for the physical address space"
39	depends on DAMON && MMU
40	select PAGE_IDLE_FLAG
41	default DAMON
42	help
43	  This builds the default data access monitoring operations for DAMON
44	  that works for the physical address space.
45
46config DAMON_VADDR_KUNIT_TEST
47	bool "Test for DAMON operations" if !KUNIT_ALL_TESTS
48	depends on DAMON_VADDR && KUNIT=y
49	default KUNIT_ALL_TESTS
50	help
51	  This builds the DAMON virtual addresses operations Kunit test suite.
52
53	  For more information on KUnit and unit tests in general, please refer
54	  to the KUnit documentation.
55
56	  If unsure, say N.
57
58config DAMON_SYSFS
59	bool "DAMON sysfs interface"
60	depends on DAMON && SYSFS
61	default DAMON
62	help
63	  This builds the sysfs interface for DAMON.  The user space can use
64	  the interface for arbitrary data access monitoring.
65
66config DAMON_SYSFS_KUNIT_TEST
67	bool "Test for damon sysfs interface" if !KUNIT_ALL_TESTS
68	depends on DAMON_SYSFS && KUNIT=y
69	default KUNIT_ALL_TESTS
70	help
71	  This builds the DAMON sysfs interface Kunit test suite.
72
73	  For more information on KUnit and unit tests in general, please refer
74	  to the KUnit documentation.
75
76	  If unsure, say N.
77
78config DAMON_RECLAIM
79	bool "Build DAMON-based reclaim (DAMON_RECLAIM)"
80	depends on DAMON_PADDR
81	help
82	  This builds the DAMON-based reclamation subsystem.  It finds pages
83	  that not accessed for a long time (cold) using DAMON and reclaim
84	  those.
85
86	  This is suggested to be used as a proactive and lightweight
87	  reclamation under light memory pressure, while the traditional page
88	  scanning-based reclamation is used for heavy pressure.
89
90config DAMON_LRU_SORT
91	bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"
92	depends on DAMON_PADDR
93	help
94	  This builds the DAMON-based LRU-lists sorting subsystem.  It tries to
95	  protect frequently accessed (hot) pages while rarely accessed (cold)
96	  pages reclaimed first under memory pressure.
97
98endmenu
99