diff options
| author | Zi Yan <ziy@nvidia.com> | 2025-05-16 16:29:37 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2025-06-01 08:46:11 +0300 |
| commit | 6d211303121fdef3b960125ceeafd1073df05ae6 (patch) | |
| tree | 8db9320fcb5496b6c974041b1f5ea785dd445d76 | |
| parent | c5a9deace6095c0dca86f5414493bcf1711f1ca3 (diff) | |
| download | linux-6d211303121fdef3b960125ceeafd1073df05ae6.tar.xz | |
selftests/mm: skip guard_regions.uffd tests when uffd is not present
Patch series "Skip mm selftests instead when kernel features are not
present", v2.
Two guard_regions tests on userfaultfd fail when userfaultfd is not
present. Skip them instead.
hugevm test reads kernel config to get page table level information and
fails when neither /proc/config.gz nor /boot/config-* is present. Skip it
instead.
This patch (of 2):
When userfaultfd is not compiled into kernel, userfaultfd() returns -1,
causing guard_regions.uffd tests to fail. Skip the tests instead.
Link: https://lkml.kernel.org/r/20250516132938.356627-1-ziy@nvidia.com
Link: https://lkml.kernel.org/r/20250516132938.356627-2-ziy@nvidia.com
Signed-off-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Pedro Falcato <pfalcato@suse.de>
Cc: Adam Sindelar <adam@wowsignal.io>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | tools/testing/selftests/mm/guard-regions.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/tools/testing/selftests/mm/guard-regions.c b/tools/testing/selftests/mm/guard-regions.c index 0cd9d236649d..93af3d3760f9 100644 --- a/tools/testing/selftests/mm/guard-regions.c +++ b/tools/testing/selftests/mm/guard-regions.c @@ -1453,8 +1453,21 @@ TEST_F(guard_regions, uffd) /* Set up uffd. */ uffd = userfaultfd(0); - if (uffd == -1 && errno == EPERM) - ksft_exit_skip("No userfaultfd permissions, try running as root.\n"); + if (uffd == -1) { + switch (errno) { + case EPERM: + SKIP(return, "No userfaultfd permissions, try running as root."); + break; + case ENOSYS: + SKIP(return, "userfaultfd is not supported/not enabled."); + break; + default: + ksft_exit_fail_msg("userfaultfd failed with %s\n", + strerror(errno)); + break; + } + } + ASSERT_NE(uffd, -1); ASSERT_EQ(ioctl(uffd, UFFDIO_API, &api), 0); |