Linux kernel mirror (for testing)
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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.