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lastdragon
2026-09-06 12:53:21 -06:00
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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.