Messages in this thread | | | From | Liu Shixin <> | Subject | [PATCH 0/2] arm64: fix two bug about page table check | Date | Wed, 16 Nov 2022 16:38:09 +0800 |
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Denys Vlasenko has reported two bug about page table check on arm64. On arm64, pmd_present() contains non-leaf pmd and invalid pmd too.
When collapse hugepage, the pmd is non-leaf and should skip the check. Use pmd_leaf() instead of pmd_present().
When split hugepage, the pmd will be marked as invalid and then populate. So we should decrease file_map_count when invalid pmd and then increase when populate the pmd.
Liu Shixin (2): arm64/mm: fix incorrect file_map_count for non-leaf pmd/pud arm64/mm: fix incorrect file_map_count for invalid pmd/pud
arch/arm64/include/asm/pgtable.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
-- 2.25.1
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