1What: /sys/kernel/mm/cma/ 2Date: Feb 2021 3Contact: Minchan Kim <minchan@kernel.org> 4Description: 5 /sys/kernel/mm/cma/ contains a subdirectory for each CMA 6 heap name (also sometimes called CMA areas). 7 8 Each CMA heap subdirectory (that is, each 9 /sys/kernel/mm/cma/<cma-heap-name> directory) contains the 10 following items: 11 12 alloc_pages_success 13 alloc_pages_fail 14 15What: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_success 16Date: Feb 2021 17Contact: Minchan Kim <minchan@kernel.org> 18Description: 19 the number of pages CMA API succeeded to allocate 20 21What: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_fail 22Date: Feb 2021 23Contact: Minchan Kim <minchan@kernel.org> 24Description: 25 the number of pages CMA API failed to allocate 26 27What: /sys/kernel/mm/cma/<cma-heap-name>/release_pages_success 28Date: Feb 2024 29Contact: Anshuman Khandual <anshuman.khandual@arm.com> 30Description: 31 the number of pages CMA API succeeded to release 32 33What: /sys/kernel/mm/cma/<cma-heap-name>/total_pages 34Date: Jun 2024 35Contact: Frank van der Linden <fvdl@google.com> 36Description: 37 The size of the CMA area in pages. 38 39What: /sys/kernel/mm/cma/<cma-heap-name>/available_pages 40Date: Jun 2024 41Contact: Frank van der Linden <fvdl@google.com> 42Description: 43 The number of pages in the CMA area that are still 44 available for CMA allocation. 45