selftests/mm: hugepage_dio: add setup of HugeTLB pages

hugepage_dio 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/20260511162840.375890-37-rppt@kernel.org
Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
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>

diff --git a/tools/testing/selftests/mm/hugetlb_dio.c b/tools/testing/selftests/mm/hugetlb_dio.c
index 47019433ddaf7bd1b3de435008eb3d78e199a2dd..fb4600570e1319cee4c154480c623546c59b9f38 100644 (file)
--- a/tools/testing/selftests/mm/hugetlb_dio.c
+++ b/tools/testing/selftests/mm/hugetlb_dio.c
@@ -85,8 +85,6 @@ static void run_dio_using_hugetlb(int fd, unsigned int start_off,
 
        /* Get the default huge page size */
        h_pagesize = default_huge_page_size();
-       if (!h_pagesize)
-               ksft_exit_fail_msg("Unable to determine huge page size\n");
 
        /* Reset file position since fd is shared across tests */
        if (lseek(fd, 0, SEEK_SET) < 0)
@@ -94,10 +92,6 @@ static void run_dio_using_hugetlb(int fd, unsigned int start_off,
 
        /* Get the free huge pages before allocation */
        free_hpage_b = hugetlb_free_default_pages();
-       if (free_hpage_b == 0) {
-               close(fd);
-               ksft_exit_skip("No free hugepage, exiting!\n");
-       }
 
        /* Allocate a hugetlb page */
        orig_buffer = mmap(NULL, h_pagesize, mmap_prot, mmap_flags, -1, 0);
@@ -141,8 +135,8 @@ int main(void)
 
        ksft_print_header();
 
-       /* Check if huge pages are free */
-       if (!hugetlb_free_default_pages())
+       /* request a huge page */
+       if (!hugetlb_setup_default(1))
                ksft_exit_skip("No free hugepage, exiting\n");
 
        fd = open("/tmp", O_TMPFILE | O_RDWR | O_DIRECT, 0664);