[PATCH 0/6] selftests/mm: Some cleanups from trying to run them

[Brendan Jackman <jackmanb@google.com>]

I never had much luck running mm selftests so I spent a couple of hours
digging into why.

Looks like most of the reason is missing SKIP checks, so this series is
just adding a bunch of those that I found. I did not do anything like
all of them, just the ones I spotted in gup_test, mmap, userfaultfd and
memfd_secret.

Signed-off-by: Brendan Jackman <jackmanb@google.com>
---
Brendan Jackman (6):
      selftests/mm: Report errno when things fail
      selftests/mm: Fix assumption that sudo is present
      selftests/mm: Skip uffd-stress if userfaultfd not available
      selftests/mm: Skip uffd-wp-mremap if userfaultfd not available
      selftests/mm: Print some details when uffd-stress gets bad params
      selftests/mm: Don't fail uffd-stress if too many CPUs

 tools/testing/selftests/mm/gup_longterm.c   | 32 ++++++++++++++---------------
 tools/testing/selftests/mm/run_vmtests.sh   | 22 ++++++++++++++++----
 tools/testing/selftests/mm/uffd-stress.c    | 11 +++++++---
 tools/testing/selftests/mm/uffd-wp-mremap.c |  5 ++++-
 4 files changed, 46 insertions(+), 24 deletions(-)
---
base-commit: 87a132e73910e8689902aed7f2fc229d6908383b
change-id: 20250220-mm-selftests-2d7d0542face

Best regards,
-- 
Brendan Jackman <jackmanb@google.com>