| What: /sys/kernel/mm/cma/ |
| Date: Feb 2021 |
| Contact: Minchan Kim <minchan@kernel.org> |
| Description: |
| /sys/kernel/mm/cma/ contains a subdirectory for each CMA |
| heap name (also sometimes called CMA areas). |
| |
| Each CMA heap subdirectory (that is, each |
| /sys/kernel/mm/cma/<cma-heap-name> directory) contains the |
| following items: |
| |
| alloc_pages_success |
| alloc_pages_fail |
| |
| What: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_success |
| Date: Feb 2021 |
| Contact: Minchan Kim <minchan@kernel.org> |
| Description: |
| the number of pages CMA API succeeded to allocate |
| |
| What: /sys/kernel/mm/cma/<cma-heap-name>/alloc_pages_fail |
| Date: Feb 2021 |
| Contact: Minchan Kim <minchan@kernel.org> |
| Description: |
| the number of pages CMA API failed to allocate |
| |
| What: /sys/kernel/mm/cma/<cma-heap-name>/release_pages_success |
| Date: Feb 2024 |
| Contact: Anshuman Khandual <anshuman.khandual@arm.com> |
| Description: |
| the number of pages CMA API succeeded to release |
| |
| What: /sys/kernel/mm/cma/<cma-heap-name>/total_pages |
| Date: Jun 2024 |
| Contact: Frank van der Linden <fvdl@google.com> |
| Description: |
| The size of the CMA area in pages. |
| |
| What: /sys/kernel/mm/cma/<cma-heap-name>/available_pages |
| Date: Jun 2024 |
| Contact: Frank van der Linden <fvdl@google.com> |
| Description: |
| The number of pages in the CMA area that are still |
| available for CMA allocation. |
