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1# SPDX-License-Identifier: GPL-2.0-only2 3menu "Data Access Monitoring"4 5config DAMON6 bool "DAMON: Data Access Monitoring Framework"7 help8 This builds a framework that allows kernel subsystems to monitor9 access frequency of each memory region. The information can be useful10 for performance-centric DRAM level memory management.11 12 See https://www.kernel.org/doc/html/latest/mm/damon/index.html for13 more information.14 15config DAMON_KUNIT_TEST16 bool "Test for damon" if !KUNIT_ALL_TESTS17 depends on DAMON && KUNIT=y18 default KUNIT_ALL_TESTS19 help20 This builds the DAMON Kunit test suite.21 22 For more information on KUnit and unit tests in general, please refer23 to the KUnit documentation.24 25 If unsure, say N.26 27config DAMON_VADDR28 bool "Data access monitoring operations for virtual address spaces"29 depends on DAMON && MMU30 select PAGE_IDLE_FLAG31 help32 This builds the default data access monitoring operations for DAMON33 that work for virtual address spaces.34 35config DAMON_PADDR36 bool "Data access monitoring operations for the physical address space"37 depends on DAMON && MMU38 select PAGE_IDLE_FLAG39 help40 This builds the default data access monitoring operations for DAMON41 that works for the physical address space.42 43config DAMON_VADDR_KUNIT_TEST44 bool "Test for DAMON operations" if !KUNIT_ALL_TESTS45 depends on DAMON_VADDR && KUNIT=y46 default KUNIT_ALL_TESTS47 help48 This builds the DAMON virtual addresses operations Kunit test suite.49 50 For more information on KUnit and unit tests in general, please refer51 to the KUnit documentation.52 53 If unsure, say N.54 55config DAMON_SYSFS56 bool "DAMON sysfs interface"57 depends on DAMON && SYSFS58 help59 This builds the sysfs interface for DAMON. The user space can use60 the interface for arbitrary data access monitoring.61 62config DAMON_SYSFS_KUNIT_TEST63 bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS64 depends on DAMON_SYSFS && KUNIT=y65 default KUNIT_ALL_TESTS66 help67 This builds the DAMON sysfs interface Kunit test suite.68 69 For more information on KUnit and unit tests in general, please refer70 to the KUnit documentation.71 72 If unsure, say N.73 74config DAMON_DBGFS_DEPRECATED75 bool "DAMON debugfs interface (DEPRECATED!)"76 depends on DAMON_VADDR && DAMON_PADDR && DEBUG_FS77 help78 This builds the debugfs interface for DAMON. The user space admins79 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 interface84 (DAMON_SYSFS). If you depend on this and cannot move, please report85 your usecase to damon@lists.linux.dev and linux-mm@kvack.org.86 87config DAMON_DBGFS88 bool89 default y90 depends on DAMON_DBGFS_DEPRECATED91 92config DAMON_DBGFS_KUNIT_TEST93 bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS94 depends on DAMON_DBGFS && KUNIT=y95 default KUNIT_ALL_TESTS96 help97 This builds the DAMON debugfs interface Kunit test suite.98 99 For more information on KUnit and unit tests in general, please refer100 to the KUnit documentation.101 102 If unsure, say N.103 104config DAMON_RECLAIM105 bool "Build DAMON-based reclaim (DAMON_RECLAIM)"106 depends on DAMON_PADDR107 help108 This builds the DAMON-based reclamation subsystem. It finds pages109 that not accessed for a long time (cold) using DAMON and reclaim110 those.111 112 This is suggested to be used as a proactive and lightweight113 reclamation under light memory pressure, while the traditional page114 scanning-based reclamation is used for heavy pressure.115 116config DAMON_LRU_SORT117 bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)"118 depends on DAMON_PADDR119 help120 This builds the DAMON-based LRU-lists sorting subsystem. It tries to121 protect frequently accessed (hot) pages while rarely accessed (cold)122 pages reclaimed first under memory pressure.123 124endmenu125