SCAN_PMD_NONE means current pmd is empty, but we can still continue collapse next pmd range. Signed-off-by: Wei Yang --- mm/khugepaged.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 7e8cb181d5bd..4c2217076ad3 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -2835,6 +2835,7 @@ int madvise_collapse(struct vm_area_struct *vma, unsigned long start, goto handle_result; /* Whitelisted set of results where continuing OK */ case SCAN_PMD_NULL: + case SCAN_PMD_NONE: case SCAN_PTE_NON_PRESENT: case SCAN_PTE_UFFD_WP: case SCAN_LACK_REFERENCED_PAGE: -- 2.34.1