1 # SPDX-License-Identifier: GPL-2.0-only 2 3 menu "Data Access Monitoring" 4 5 config 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 15 config 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 27 config DAMON_VADDR 28 bool "Data access monitoring primitives for virtual address spaces" 29 depends on DAMON && MMU 30 select PAGE_IDLE_FLAG 31 help 32 This builds the default data access monitoring primitives for DAMON 33 that work for virtual address spaces. 34 35 config DAMON_PADDR 36 bool "Data access monitoring primitives 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 primitives for DAMON 41 that works for the physical address space. 42 43 config DAMON_VADDR_KUNIT_TEST 44 bool "Test for DAMON primitives" 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 primitives 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 55 config DAMON_DBGFS 56 bool "DAMON debugfs interface" 57 depends on DAMON_VADDR && DAMON_PADDR && DEBUG_FS 58 help 59 This builds the debugfs interface for DAMON. The user space admins 60 can use the interface for arbitrary data access monitoring. 61 62 If unsure, say N. 63 64 config DAMON_DBGFS_KUNIT_TEST 65 bool "Test for damon debugfs interface" if !KUNIT_ALL_TESTS 66 depends on DAMON_DBGFS && KUNIT=y 67 default KUNIT_ALL_TESTS 68 help 69 This builds the DAMON debugfs interface Kunit test suite. 70 71 For more information on KUnit and unit tests in general, please refer 72 to the KUnit documentation. 73 74 If unsure, say N. 75 76 config DAMON_RECLAIM 77 bool "Build DAMON-based reclaim (DAMON_RECLAIM)" 78 depends on DAMON_PADDR 79 help 80 This builds the DAMON-based reclamation subsystem. It finds pages 81 that not accessed for a long time (cold) using DAMON and reclaim 82 those. 83 84 This is suggested to be used as a proactive and lightweight 85 reclamation under light memory pressure, while the traditional page 86 scanning-based reclamation is used for heavy pressure. 87 88 endmenu 89