From cc48be374b654e1533c40cd64ebc4e4b0a637317 Mon Sep 17 00:00:00 2001 From: Frank van der Linden Date: Tue, 30 Apr 2024 16:14:37 +0000 Subject: mm/hugetlb: align cma on allocation order, not demotion order Align the CMA area for hugetlb gigantic pages to their size, not the size that they can be demoted to. Otherwise there might be misaligned sections at the start and end of the CMA area that will never be used for hugetlb page allocations. Link: https://lkml.kernel.org/r/20240430161437.2100295-1-fvdl@google.com Fixes: a01f43901cfb ("hugetlb: be sure to free demoted CMA pages to CMA") Signed-off-by: Frank van der Linden Reviewed-by: David Hildenbrand Reviewed-by: Roman Gushchin Cc: Muchun Song Signed-off-by: Andrew Morton --- mm/hugetlb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'mm') diff --git a/mm/hugetlb.c b/mm/hugetlb.c index a7efb350f5d0..33d175add044 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -7800,7 +7800,7 @@ void __init hugetlb_cma_reserve(int order) * huge page demotion. */ res = cma_declare_contiguous_nid(0, size, 0, - PAGE_SIZE << HUGETLB_PAGE_ORDER, + PAGE_SIZE << order, HUGETLB_PAGE_ORDER, false, name, &hugetlb_cma[nid], nid); if (res) { -- cgit v1.2.3