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 default DAMON 32 help 33 This builds the default data access monitoring operations for DAMON 34 that work for virtual address spaces. 35 36config DAMON_PADDR 37 bool "Data access monitoring operations for the physical address space" 38 depends on DAMON && MMU 39 select PAGE_IDLE_FLAG 40 default DAMON 41 help 42 This builds the default data access monitoring operations for DAMON 43 that works for the physical address space. 44 45config DAMON_VADDR_KUNIT_TEST 46 bool "Test for DAMON operations" if !KUNIT_ALL_TESTS 47 depends on DAMON_VADDR && KUNIT=y 48 default KUNIT_ALL_TESTS 49 help 50 This builds the DAMON virtual addresses operations Kunit test suite. 51 52 For more information on KUnit and unit tests in general, please refer 53 to the KUnit documentation. 54 55 If unsure, say N. 56 57config DAMON_SYSFS 58 bool "DAMON sysfs interface" 59 depends on DAMON && SYSFS 60 default DAMON 61 help 62 This builds the sysfs interface for DAMON. The user space can use 63 the interface for arbitrary data access monitoring. 64 65config DAMON_SYSFS_KUNIT_TEST 66 bool "Test for damon sysfs interface" if !KUNIT_ALL_TESTS 67 depends on DAMON_SYSFS && KUNIT=y 68 default KUNIT_ALL_TESTS 69 help 70 This builds the DAMON sysfs interface Kunit test suite. 71 72 For more information on KUnit and unit tests in general, please refer 73 to the KUnit documentation. 74 75 If unsure, say N. 76 77config DAMON_RECLAIM 78 bool "Build DAMON-based reclaim (DAMON_RECLAIM)" 79 depends on DAMON_PADDR 80 help 81 This builds the DAMON-based reclamation subsystem. It finds pages 82 that not accessed for a long time (cold) using DAMON and reclaim 83 those. 84 85 This is suggested to be used as a proactive and lightweight 86 reclamation under light memory pressure, while the traditional page 87 scanning-based reclamation is used for heavy pressure. 88 89config DAMON_LRU_SORT 90 bool "Build DAMON-based LRU-lists sorting (DAMON_LRU_SORT)" 91 depends on DAMON_PADDR 92 help 93 This builds the DAMON-based LRU-lists sorting subsystem. It tries to 94 protect frequently accessed (hot) pages while rarely accessed (cold) 95 pages reclaimed first under memory pressure. 96 97endmenu 98