diff options
| author | Peter Xu <peterx@redhat.com> | 2020-12-15 06:14:08 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-15 23:13:46 +0300 |
| commit | d9f411bacfa0c3d0d97580a66f88e70f92bcf58e (patch) | |
| tree | c4afeb82fdc6d12126d9b60752c315e913547efb /tools | |
| parent | 1e17a24edf9bef891bbdd02617eaab4fa6efcd7f (diff) | |
| download | linux-d9f411bacfa0c3d0d97580a66f88e70f92bcf58e.tar.xz | |
userfaultfd/selftests: hint the test runner on required privilege
Now userfaultfd test program requires either root or ptrace privilege due
to the signal/event tests. When UFFDIO_API failed, hint the test runner
about this fact verbosely.
Link: https://lkml.kernel.org/r/20201208024709.7701-4-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/vm/userfaultfd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c index 6e482e2f198c..9d8650d4ba5a 100644 --- a/tools/testing/selftests/vm/userfaultfd.c +++ b/tools/testing/selftests/vm/userfaultfd.c @@ -794,7 +794,8 @@ static int userfaultfd_open(int features) uffdio_api.api = UFFD_API; uffdio_api.features = features; if (ioctl(uffd, UFFDIO_API, &uffdio_api)) { - fprintf(stderr, "UFFDIO_API\n"); + fprintf(stderr, "UFFDIO_API failed.\nPlease make sure to " + "run with either root or ptrace capability.\n"); return 1; } if (uffdio_api.api != UFFD_API) { |