linux-stable.git/tools/testing/selftests/vm, branch v5.11

selftests/vm: rename file run_vmtests to run_vmtests.sh

2021-02-10T01:26:44+00:00

Commit c2aa8afc36fa has renamed run_vmtests in Makefile, but the file
still uses the old name.

The kernel test robot reported the following issue:

  # selftests: vm: run_vmtests.sh
  # Warning: file run_vmtests.sh is missing!
  not ok 1 selftests: vm: run_vmtests.sh

Link: https://lkml.kernel.org/r/20210205085507.1479894-1-rong.a.chen@intel.com
Fixes: c2aa8afc36fa (selftests/vm: rename run_vmtests --> run_vmtests.sh)
Signed-off-by: Rong Chen 
Reported-by: kernel test robot 
Reviewed-by: John Hubbard 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: fix building protection keys test

2020-12-29T23:36:49+00:00

Commit d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error") tried
to include a ARCH check for powerpc, however ARCH is not defined in the
Makefile before including lib.mk.  This makes test building to skip on
both x86 and powerpc.

Fix the arch check by replacing it using machine type as it is already
defined and used in the test.

Link: https://lkml.kernel.org/r/20201215100402.257376-1-harish@linux.ibm.com
Fixes: d8cbe8bfa7d ("tools/testing/selftests/vm: fix build error")
Signed-off-by: Harish 
Reviewed-by: Sandipan Das 
Cc: Shuah Khan 
Cc: Sandipan Das 
Cc: John Hubbard 
Cc: Dave Hansen 
Cc: Kirill A. Shutemov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'linux-kselftest-next-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2020-12-16T08:17:58+00:00

Pull Kselftest updates from Shuah Khan:

 - Much needed gpio test Makefile cleanup to various problems with test
   dependencies and build errors from Michael Ellerman

 - Enabling vDSO test on non x86 platforms from Vincenzo Frascino

 - Fix intel_pstate to replace deprecated ftime() usages with
   clock_gettime() from Tommi Rantala

 - cgroup test build fix on older releases from Sachin Sant

 - A couple of spelling mistake fixes

* tag 'linux-kselftest-next-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/cgroup: Fix build on older distros
  selftests/run_kselftest.sh: fix dry-run typo
  tool: selftests: fix spelling typo of 'writting'
  selftests/memfd: Fix implicit declaration warnings
  selftests: intel_pstate: ftime() is deprecated
  selftests/gpio: Add to CLEAN rule rather than overriding
  selftests/gpio: Fix build when source tree is read only
  selftests/gpio: Move include of lib.mk up
  selftests/gpio: Use TEST_GEN_PROGS_EXTENDED
  kselftest: Extend vdso correctness test to clock_gettime64
  kselftest: Move test_vdso to the vDSO test suite
  kselftest: Extend vDSO selftest to clock_getres
  kselftest: Extend vDSO selftest
  kselftest: Enable vDSO test on non x86 platforms

userfaultfd/selftests: hint the test runner on required privilege

2020-12-15T20:13:46+00:00

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 
Cc: Andrea Arcangeli 
Cc: Mike Rapoport 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd/selftests: fix retval check for userfaultfd_open()

2020-12-15T20:13:46+00:00

userfaultfd_open() returns 1 for errors rather than negatives.  Fix it on
all the callers so when UFFDIO_API failed the test will bail out.

Link: https://lkml.kernel.org/r/20201208024709.7701-3-peterx@redhat.com
Signed-off-by: Peter Xu 
Cc: Andrea Arcangeli 
Cc: Mike Rapoport 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd/selftests: always dump something in modes

2020-12-15T20:13:46+00:00

Patch series "userfaultfd: selftests: Small fixes".

Some very trivial fixes that I kept locally to userfaultfd selftest
program.

This patch (of 3):

BOUNCE_POLL is a special bit that if cleared it means "READ" instead.
Dump that too otherwise we'll see tests with empty modes.

Link: https://lkml.kernel.org/r/20201208024709.7701-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20201208024709.7701-2-peterx@redhat.com
Signed-off-by: Peter Xu 
Cc: Andrea Arcangeli 
Cc: Mike Rapoport 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftests: make __{s,u}64 format specifiers portable

2020-12-15T20:13:46+00:00

On certain platforms (powerpcle is the one on which I ran into this),
"%Ld" and "%Lu" are unsuitable for printing __s64 and __u64, respectively,
resulting in build warnings.  Cast to {u,}int64_t, and use the PRI{d,u}64
macros defined in inttypes.h to print them.  This ought to be portable to
all platforms.

Splitting this off into a separate macro lets us remove some lines, and
get rid of some (I would argue) stylistically odd cases where we joined
printf() and exit() into a single statement with a ,.

Finally, this also fixes a "missing braces around initializer" warning
when we initialize prms in wp_range().

[axelrasmussen@google.com: v2]
  Link: https://lkml.kernel.org/r/20201203180244.1811601-1-axelrasmussen@google.com

Link: https://lkml.kernel.org/r/20201202211542.1121189-1-axelrasmussen@google.com
Signed-off-by: Axel Rasmussen 
Acked-by: Peter Xu 
Cc: Shuah Khan 
Cc: Joe Perches 
Cc: Mike Rapoport 
Cc: Andrea Arcangeli 
Cc: David Alan Gilbert 
Cc: Greg Thelen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

kselftests: vm: add mremap tests

2020-12-15T20:13:40+00:00

Patch series "Speed up mremap on large regions", v4.

mremap time can be optimized by moving entries at the PMD/PUD level if the
source and destination addresses are PMD/PUD-aligned and PMD/PUD-sized.
Enable moving at the PMD and PUD levels on arm64 and x86.  Other
architectures where this type of move is supported and known to be safe
can also opt-in to these optimizations by enabling HAVE_MOVE_PMD and
HAVE_MOVE_PUD.

Observed Performance Improvements for remapping a PUD-aligned 1GB-sized
region on x86 and arm64:

    - HAVE_MOVE_PMD is already enabled on x86 : N/A
    - Enabling HAVE_MOVE_PUD on x86   : ~13x speed up

    - Enabling HAVE_MOVE_PMD on arm64 : ~ 8x speed up
    - Enabling HAVE_MOVE_PUD on arm64 : ~19x speed up

          Altogether, HAVE_MOVE_PMD and HAVE_MOVE_PUD
          give a total of ~150x speed up on arm64.

This patch (of 4):

Test mremap on regions of various sizes and alignments and validate data
after remapping.  Also provide total time for remapping the region which
is useful for performance comparison of the mremap optimizations that move
pages at the PMD/PUD levels if HAVE_MOVE_PMD and/or HAVE_MOVE_PUD are
enabled.

Link: https://lkml.kernel.org/r/20201014005320.2233162-1-kaleshsingh@google.com
Link: https://lkml.kernel.org/r/20201014005320.2233162-2-kaleshsingh@google.com
Signed-off-by: Kalesh Singh 
Reviewed-by: John Hubbard 
Cc: Shuah Khan 
Cc: Kirill A. Shutemov 
Cc: Suren Baghdasaryan 
Cc: Minchan Kim 
Cc: Lokesh Gidra 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Borislav Petkov 
Cc: "H. Peter Anvin" 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Peter Zijlstra (Intel) 
Cc: Kees Cook 
Cc: Aneesh Kumar K.V 
Cc: Arnd Bergmann 
Cc: Sami Tolvanen 
Cc: Masahiro Yamada 
Cc: Krzysztof Kozlowski 
Cc: Frederic Weisbecker 
Cc: Hassan Naveed 
Cc: Christian Brauner 
Cc: Anshuman Khandual 
Cc: Mark Rutland 
Cc: Gavin Shan 
Cc: Mike Rapoport 
Cc: Steven Price 
Cc: Jia He 
Cc: Ram Pai 
Cc: Sandipan Das 
Cc: Zi Yan 
Cc: Mina Almasry 
Cc: Ralph Campbell 
Cc: Dave Hansen 
Cc: Brian Geffon 
Cc: Masami Hiramatsu 
Cc: SeongJae Park 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: 2x speedup for run_vmtests.sh

2020-12-15T20:13:38+00:00

Each invocation of userfaultfd for "anon" and "shmem" was taking about
6.5 sec to run, contributing to an overall run time of about 22 sec for
run_vmtests.sh.

Reduce the size and bounce input values to the userfaultfd invocation
within run_vmtests.sh, enough to get each invocation down to about 1.0
sec. This should still provide a reasonable smoke test, while staying
within a nominal time budget of around 1 second or so per test. And this
brings the overall running time of run_vmtests.sh down to 11 second.

Link: https://lkml.kernel.org/r/20201026064021.3545418-10-jhubbard@nvidia.com
Signed-off-by: John Hubbard 
Cc: Mike Rapoport 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: hmm-tests: remove the libhugetlbfs dependency

2020-12-15T20:13:38+00:00

HMM selftests are incredibly useful, but they are only effective if people
actually build and run them.  All the other tests in selftests/vm can be
built with very standard, always-available libraries: libpthread, librt.
The hmm-tests.c program, on the other hand, requires something that is
(much) less readily available: libhugetlbfs.  And so the build will
typically fail for many developers.

A simple attempt to install libhugetlbfs will also run into complications
on some common distros these days: Fedora and Arch Linux (yes, Arch AUR
has it, but that's fragile, as always with AUR).  The library is not
maintained actively enough at the moment, for distros to deal with it.  I
had to build it from source, for Fedora, and that didn't go too smoothly
either.

It turns out that, out of 21 tests in hmm-tests.c, only 2 actually require
functionality from libhugetlbfs.  Therefore, if libhugetlbfs is missing,
simply ifdef those two tests out and allow the developer to at least have
the other 19 tests, if they don't want to pause to work through the above
issues.  Also issue a warning, so that it's clear that there is an
imperfection in the build.

In order to do that, a tiny shell script (check_config.sh) runs a quick
compile (not link, that's too prone to false failures with library paths),
and basically, if the compiler doesn't find hugetlbfs.h in its standard
locations, then the script concludes that libhugetlbfs is not available.
The output is in two files, one for inclusion in hmm-test.c
(local_config.h), and one for inclusion in the Makefile (local_config.mk).

Link: https://lkml.kernel.org/r/20201026064021.3545418-9-jhubbard@nvidia.com
Signed-off-by: John Hubbard 
Cc: Ralph Campbell 
Cc: Jérôme Glisse 
Cc: Jonathan Corbet 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds