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| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2024-02-09 11:12:21 +0530 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-22 10:24:59 -0800 |
| commit | ce70cfb145ad98739c8ae23d070a37863a4c52bb (patch) | |
| tree | 485728b8a03980b3678c1ef24e609b82d944cb59 /mm/hugetlb.c | |
| parent | 4acef5694e01a2d7de3066e9a6005d485b4374b9 (diff) | |
| download | linux-ce70cfb145ad98739c8ae23d070a37863a4c52bb.tar.gz linux-ce70cfb145ad98739c8ae23d070a37863a4c52bb.tar.bz2 linux-ce70cfb145ad98739c8ae23d070a37863a4c52bb.zip | |
mm/hugetlb: move page order check inside hugetlb_cma_reserve()
All platforms could benefit from page order check against MAX_PAGE_ORDER
before allocating a CMA area for gigantic hugetlb pages. Let's move this
check from individual platforms to generic hugetlb.
Link: https://lkml.kernel.org/r/20240209054221.1403364-1-anshuman.khandual@arm.com
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Jane Chu <jane.chu@oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 3d651fc1dd66..c53a41d07cd3 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -7720,6 +7720,13 @@ void __init hugetlb_cma_reserve(int order) bool node_specific_cma_alloc = false; int nid; + /* + * HugeTLB CMA reservation is required for gigantic + * huge pages which could not be allocated via the + * page allocator. Just warn if there is any change + * breaking this assumption. + */ + VM_WARN_ON(order <= MAX_PAGE_ORDER); cma_reserve_called = true; if (!hugetlb_cma_size) |