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selftests/mm: hugetlb-mmap: add setup of HugeTLB pages

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hugetlb-mmap test fails if there are no free huge pages prepared by a
wrapper script.

Add setup of HugeTLB pages to the test and make sure that the original
settings are restored on the test exit.

Link: https://lore.kernel.org/20260511162840.375890-41-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Luiz Capitulino <luizcap@redhat.com>
Tested-by: Sarthak Sharma <sarthak.sharma@arm.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Donet Tom <donettom@linux.ibm.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Liam Howlett <liam@infradead.org>
Cc: Li Wang <li.wang@linux.dev>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Mike Rapoport (Microsoft) 2026-05-11 19:28:24 +03:00 committed by Andrew Morton
parent afa1b71900
commit ae571cd601
1 changed files with 11 additions and 4 deletions
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15
tools/testing/selftests/mm/hugetlb-mmap.c
View File

@ -105,28 +105,35 @@ int main(int argc, char **argv)
{
size_t hugepage_size;
size_t length = LENGTH;
int shift = 0;
int shift = 0, nr;
ksft_print_header();
ksft_set_plan(2);
if (argc > 1)
length = atol(argv[1]) << 20;
if (argc > 2)
shift = atoi(argv[2]);
hugetlb_save_settings();
if (shift) {
hugepage_size = (1UL << shift);
ksft_print_msg("%lu kB hugepages\n", 1UL << (shift - 10));
} else {
hugepage_size = default_huge_page_size();
if (!hugepage_size)
ksft_exit_skip("Could not detect default hugetlb page size.");
ksft_print_msg("Default size hugepages (%lu kB)\n", hugepage_size >> 10);
}
/* munmap will fail if the length is not page aligned */
if (hugepage_size > length)
length = hugepage_size;
length = (length + hugepage_size - 1) & ~(hugepage_size - 1);
nr = length / hugepage_size;
hugetlb_set_nr_pages(hugepage_size, nr);
if (hugetlb_free_pages(hugepage_size) < nr)
ksft_exit_skip("Not enough %lu Kb pages\n", hugepage_size >> 10);
ksft_set_plan(2);
ksft_print_msg("Mapping %lu Mbytes\n", (unsigned long)length >> 20);
test_anon_mmap(length, shift);