tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1# SPDX-License-Identifier: GPL-2.0-only
2
3menu "Data Access Monitoring"
4
5config 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
15config 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
27config 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
35config 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
43config 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
55config 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
62config 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
75config 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
87config 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
99config 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
107endmenu