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| author | Baolin Wang <[email protected]> | 2024-10-14 18:24:44 +0800 |
|---|---|---|
| committer | Andrew Morton <[email protected]> | 2024-10-17 00:28:10 -0700 |
| commit | d60fcaf00d752c52fdf566d4184e6d04d9d08879 (patch) | |
| tree | 96fb13f785b37347d6f27f61b6e0527f0ca8fcd5 /tools/testing/selftests/bpf/prog_tests/autoload.c | |
| parent | 22ff9b0ff11a762852cd620972f265b3129e3fe7 (diff) | |
mm: khugepaged: fix the incorrect statistics when collapsing large file folios
Khugepaged already supports collapsing file large folios (including shmem
mTHP) by commit 7de856ffd007 ("mm: khugepaged: support shmem mTHP
collapse"), and the control parameters in khugepaged:
'khugepaged_max_ptes_swap' and 'khugepaged_max_ptes_none', still compare
based on PTE granularity to determine whether a file collapse is needed.
However, the statistics for 'present' and 'swap' in
hpage_collapse_scan_file() do not take into account the large folios,
which may lead to incorrect judgments regarding the
khugepaged_max_ptes_swap/none parameters, resulting in unnecessary file
collapses.
To fix this issue, take into account the large folios' statistics for
'present' and 'swap' variables in the hpage_collapse_scan_file().
Link: https://lkml.kernel.org/r/c76305d96d12d030a1a346b50503d148364246d2.1728901391.git.baolin.wang@linux.alibaba.com
Fixes: 7de856ffd007 ("mm: khugepaged: support shmem mTHP collapse")
Signed-off-by: Baolin Wang <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Barry Song <[email protected]>
Reviewed-by: Zi Yan <[email protected]>
Reviewed-by: Yang Shi <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Ryan Roberts <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/autoload.c')
0 files changed, 0 insertions, 0 deletions