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Message-ID: <20240306223714.320681-3-npache@redhat.com>
Date: Wed, 6 Mar 2024 15:37:13 -0700
From: Nico Pache <npache@...hat.com>
To: linux-mm@...ck.org,
linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: ben@...adent.org.uk,
shuah@...nel.org,
akpm@...ux-foundation.org,
usama.anjum@...labora.com
Subject: [PATCH v2 2/3] 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.
Signed-off-by: Nico Pache <npache@...hat.com>
---
tools/testing/selftests/mm/uffd-stress.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/testing/selftests/mm/uffd-stress.c b/tools/testing/selftests/mm/uffd-stress.c
index 7e83829bbb335..1165446f10883 100644
--- a/tools/testing/selftests/mm/uffd-stress.c
+++ b/tools/testing/selftests/mm/uffd-stress.c
@@ -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;
--
2.44.0
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