On 9/12/24 04:31, Muhammad Usama Anjum wrote:
The userfaultfd is enabled in the config fragment of mm selftest suite. It must always be present. If it isn't present, we should throw error and not just skip. This would have helped us catch the test breakage.
Please elaborate on this to help understand the what breakage was missed.
Also this commit log doesn't look right to me. syscall() could fail for any reason. Do you mean to see skip is incorrect in this error leg? Please see comments below.
Adding this now to catch the future breakages.
Signed-off-by: Muhammad Usama Anjum usama.anjum@collabora.com
tools/testing/selftests/mm/pagemap_ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/mm/pagemap_ioctl.c b/tools/testing/selftests/mm/pagemap_ioctl.c index bcc73b4e805c6..d83dda8edf62c 100644 --- a/tools/testing/selftests/mm/pagemap_ioctl.c +++ b/tools/testing/selftests/mm/pagemap_ioctl.c @@ -95,7 +95,7 @@ int init_uffd(void) uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK | UFFD_USER_MODE_ONLY); if (uffd == -1)
return uffd;
ksft_exit_fail_perror("Userfaultfd syscall failed");
This looks wrong to me - Is missing config the only reason this syscall would fail?
uffdio_api.api = UFFD_API; uffdio_api.features = UFFD_FEATURE_WP_UNPOPULATED | UFFD_FEATURE_WP_ASYNC |
thanks, -- Shuah