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://www.kernel.org/doc/html/latest/mm/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_SYSFS_KUNIT_TEST
 63	bool "Test for damon sysfs interface" if !KUNIT_ALL_TESTS
 64	depends on DAMON_SYSFS && KUNIT=y
 65	default KUNIT_ALL_TESTS
 66	help
 67	  This builds the DAMON sysfs interface Kunit test suite.
 68
 69	  For more information on KUnit and unit tests in general, please refer
 70	  to the KUnit documentation.
 71
 72	  If unsure, say N.
 73
 74config DAMON_DBGFS_DEPRECATED
 75	bool "DAMON debugfs interface (DEPRECATED!)"
 76	depends on DAMON_VADDR && DAMON_PADDR && DEBUG_FS
 77	help
 78	  This builds the debugfs interface for DAMON.  The user space admins
 79	  can use the interface for arbitrary data access monitoring.
 80
 81	  If unsure, say N.
 82
 83	  This is deprecated, so users should move to the sysfs interface
 84	  (DAMON_SYSFS).  If you depend on this and cannot move, please report
 85	  your usecase to damon@lists.linux.dev and linux-mm@kvack.org.
 86
 87config DAMON_DBGFS
 88	bool
 89	default y
 90	depends on DAMON_DBGFS_DEPRECATED
 91
 92config DAMON_DBGFS_KUNIT_TEST
 93	bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
 94	depends on DAMON_DBGFS && KUNIT=y
 95	default KUNIT_ALL_TESTS
 96	help
 97	  This builds the DAMON debugfs interface Kunit test suite.
 98
 99	  For more information on KUnit and unit tests in general, please refer
100	  to the KUnit documentation.
101
102	  If unsure, say N.
103
104config DAMON_RECLAIM
105	bool "Build DAMON-based reclaim (DAMON_RECLAIM)"
106	depends on DAMON_PADDR
107	help
108	  This builds the DAMON-based reclamation subsystem.  It finds pages
109	  that not accessed for a long time (cold) using DAMON and reclaim
110	  those.
111
112	  This is suggested to be used as a proactive and lightweight
113	  reclamation under light memory pressure, while the traditional page
114	  scanning-based reclamation is used for heavy pressure.
115
116config DAMON_LRU_SORT
117	bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"
118	depends on DAMON_PADDR
119	help
120	  This builds the DAMON-based LRU-lists sorting subsystem.  It tries to
121	  protect frequently accessed (hot) pages while rarely accessed (cold)
122	  pages reclaimed first under memory pressure.
123
124endmenu