xref: /openbmc/linux/mm/damon/Kconfig (revision 9a87ffc99ec8eb8d35eed7c4f816d75f5cc9662e)
1 # SPDX-License-Identifier: GPL-2.0-only
2 
3 menu "Data Access Monitoring"
4 
5 config DAMON
6 	bool "DAMON: Data Access Monitoring Framework"
7 	help
8 	  This builds a framework that allows kernel subsystems to monitor
9 	  access frequency of each memory region. The information can be useful
10 	  for performance-centric DRAM level memory management.
11 
12 	  See https://damonitor.github.io/doc/html/latest-damon/index.html for
13 	  more information.
14 
15 config DAMON_KUNIT_TEST
16 	bool "Test for damon" if !KUNIT_ALL_TESTS
17 	depends on DAMON && KUNIT=y
18 	default KUNIT_ALL_TESTS
19 	help
20 	  This builds the DAMON Kunit test suite.
21 
22 	  For more information on KUnit and unit tests in general, please refer
23 	  to the KUnit documentation.
24 
25 	  If unsure, say N.
26 
27 config DAMON_VADDR
28 	bool "Data access monitoring operations for virtual address spaces"
29 	depends on DAMON && MMU
30 	select PAGE_IDLE_FLAG
31 	help
32 	  This builds the default data access monitoring operations for DAMON
33 	  that work for virtual address spaces.
34 
35 config DAMON_PADDR
36 	bool "Data access monitoring operations for the physical address space"
37 	depends on DAMON && MMU
38 	select PAGE_IDLE_FLAG
39 	help
40 	  This builds the default data access monitoring operations for DAMON
41 	  that works for the physical address space.
42 
43 config DAMON_VADDR_KUNIT_TEST
44 	bool "Test for DAMON operations" if !KUNIT_ALL_TESTS
45 	depends on DAMON_VADDR && KUNIT=y
46 	default KUNIT_ALL_TESTS
47 	help
48 	  This builds the DAMON virtual addresses operations Kunit test suite.
49 
50 	  For more information on KUnit and unit tests in general, please refer
51 	  to the KUnit documentation.
52 
53 	  If unsure, say N.
54 
55 config DAMON_SYSFS
56 	bool "DAMON sysfs interface"
57 	depends on DAMON && SYSFS
58 	help
59 	  This builds the sysfs interface for DAMON.  The user space can use
60 	  the interface for arbitrary data access monitoring.
61 
62 config DAMON_DBGFS
63 	bool "DAMON debugfs interface (DEPRECATED!)"
64 	depends on DAMON_VADDR && DAMON_PADDR && DEBUG_FS
65 	help
66 	  This builds the debugfs interface for DAMON.  The user space admins
67 	  can use the interface for arbitrary data access monitoring.
68 
69 	  If unsure, say N.
70 
71 	  This is deprecated, so users should move to the sysfs interface
72 	  (DAMON_SYSFS).  If you depend on this and cannot move, please report
73 	  your usecase to damon@lists.linux.dev and linux-mm@kvack.org.
74 
75 config DAMON_DBGFS_KUNIT_TEST
76 	bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
77 	depends on DAMON_DBGFS && KUNIT=y
78 	default KUNIT_ALL_TESTS
79 	help
80 	  This builds the DAMON debugfs interface Kunit test suite.
81 
82 	  For more information on KUnit and unit tests in general, please refer
83 	  to the KUnit documentation.
84 
85 	  If unsure, say N.
86 
87 config DAMON_RECLAIM
88 	bool "Build DAMON-based reclaim (DAMON_RECLAIM)"
89 	depends on DAMON_PADDR
90 	help
91 	  This builds the DAMON-based reclamation subsystem.  It finds pages
92 	  that not accessed for a long time (cold) using DAMON and reclaim
93 	  those.
94 
95 	  This is suggested to be used as a proactive and lightweight
96 	  reclamation under light memory pressure, while the traditional page
97 	  scanning-based reclamation is used for heavy pressure.
98 
99 config DAMON_LRU_SORT
100 	bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"
101 	depends on DAMON_PADDR
102 	help
103 	  This builds the DAMON-based LRU-lists sorting subsystem.  It tries to
104 	  protect frequently accessed (hot) pages while rarely accessed (cold)
105 	  pages reclaimed first under memory pressure.
106 
107 endmenu
108