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"
 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 will be removed after >5.15.y LTS kernel is released, so users
 72	  should move to the sysfs interface (DAMON_SYSFS).
 73
 74config DAMON_DBGFS_KUNIT_TEST
 75	bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS
 76	depends on DAMON_DBGFS && KUNIT=y
 77	default KUNIT_ALL_TESTS
 78	help
 79	  This builds the DAMON debugfs interface Kunit test suite.
 80
 81	  For more information on KUnit and unit tests in general, please refer
 82	  to the KUnit documentation.
 83
 84	  If unsure, say N.
 85
 86config DAMON_RECLAIM
 87	bool "Build DAMON-based reclaim (DAMON_RECLAIM)"
 88	depends on DAMON_PADDR
 89	help
 90	  This builds the DAMON-based reclamation subsystem.  It finds pages
 91	  that not accessed for a long time (cold) using DAMON and reclaim
 92	  those.
 93
 94	  This is suggested to be used as a proactive and lightweight
 95	  reclamation under light memory pressure, while the traditional page
 96	  scanning-based reclamation is used for heavy pressure.
 97
 98config DAMON_LRU_SORT
 99	bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"
100	depends on DAMON_PADDR
101	help
102	  This builds the DAMON-based LRU-lists sorting subsystem.  It tries to
103	  protect frequently accessed (hot) pages while rarely accessed (cold)
104	  pages reclaimed first under memory pressure.
105
106endmenu