Commit 5a6aa60d authored by Nico Pache's avatar Nico Pache Committed by Andrew Morton
Browse files

selftests/mm: skip uffd hugetlb tests with insufficient hugepages 

Now that run_vmtests.sh does not guarantee that the correct hugepage count
is available, add a check inside the userfaultfd hugetlb test to verify
the nr_hugepages count before continuing.

Link: https://lkml.kernel.org/r/20240306223714.320681-3-npache@redhat.com


Signed-off-by: default avatarNico Pache <npache@redhat.com>
Cc: Ben Hutchings <ben@decadent.org.uk>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 2fd570c1

tools/testing/selftests/mm/uffd-stress.c

+6 −0
Original line number Diff line number Diff line
@@ -441,6 +441,12 @@ int main(int argc, char **argv) 
	parse_test_type_arg(argv[1]);

	bytes = atol(argv[2]) * 1024 * 1024;



	if (test_type == TEST_HUGETLB &&

	   get_free_hugepages() < bytes / page_size) {

		printf("skip: Skipping userfaultfd... not enough hugepages\n");

		return KSFT_SKIP;

	}



	nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);



	nr_pages_per_cpu = bytes / page_size / nr_cpus;