linux-toradex.git/tools/testing/selftests/vm/run_vmtests, branch master

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

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: run_vmtests.sh: update and clean up gup_test invocation

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

Run benchmarks on the _fast variants of gup and pup, as originally
intended.

Run the new gup_test sub-test: dump pages.  In addition to exercising the
dump_page() call, it also demonstrates the various options you can use to
specify which pages to dump, and how.

Link: https://lkml.kernel.org/r/20201026064021.3545418-8-jhubbard@nvidia.com
Signed-off-by: John Hubbard 
Cc: Jérôme Glisse 
Cc: Jonathan Corbet 
Cc: Ralph Campbell 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/gup_benchmark: rename to mm/gup_test

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

Patch series "selftests/vm: gup_test, hmm-tests, assorted improvements", v3.

Summary: This series provides two main things, and a number of smaller
supporting goodies.  The two main points are:

1) Add a new sub-test to gup_test, which in turn is a renamed version
   of gup_benchmark.  This sub-test allows nicer testing of dump_pages(),
   at least on user-space pages.

   For quite a while, I was doing a quick hack to gup_test.c whenever I
   wanted to try out changes to dump_page().  Then Matthew Wilcox asked me
   what I meant when I said "I used my dump_page() unit test", and I
   realized that it might be nice to check in a polished up version of
   that.

   Details about how it works and how to use it are in the commit
   description for patch #6 ("selftests/vm: gup_test: introduce the
   dump_pages() sub-test").

2) Fixes a limitation of hmm-tests: these tests are incredibly useful,
   but only if people actually build and run them.  And it turns out that
   libhugetlbfs is a little too effective at throwing a wrench in the
   works, there.  So I've added a little configuration check that removes
   just two of the 21 hmm-tests, if libhugetlbfs is not available.

   Further details in the commit description of patch #8
   ("selftests/vm: hmm-tests: remove the libhugetlbfs dependency").

Other smaller things that this series does:

a) Remove code duplication by creating gup_test.h.

b) Clear up the sub-test organization, and their invocation within
   run_vmtests.sh.

c) Other minor assorted improvements.

[1] v2 is here:
https://lore.kernel.org/linux-doc/20200929212747.251804-1-jhubbard@nvidia.com/

[2] https://lore.kernel.org/r/CAHk-=wgh-TMPHLY3jueHX7Y2fWh3D+nMBqVS__AZm6-oorquWA@mail.gmail.com

This patch (of 9):

Rename nearly every "gup_benchmark" reference and file name to "gup_test".
The one exception is for the actual gup benchmark test itself.

The current code already does a *little* bit more than benchmarking, and
definitely covers more than get_user_pages_fast().  More importantly,
however, subsequent patches are about to add some functionality that is
non-benchmark related.

Closely related changes:

* Kconfig: in addition to renaming the options from GUP_BENCHMARK to
  GUP_TEST, update the help text to reflect that it's no longer a
  benchmark-only test.

Link: https://lkml.kernel.org/r/20201026064021.3545418-1-jhubbard@nvidia.com
Link: https://lkml.kernel.org/r/20201026064021.3545418-2-jhubbard@nvidia.com
Signed-off-by: John Hubbard 
Cc: Jonathan Corbet 
Cc: Jérôme Glisse 
Cc: Ralph Campbell 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm/hmm/test: add selftests for HMM

2020-05-19T19:48:31+00:00

Add some basic stand alone self tests for HMM.
The test program and shell scripts use the test_hmm.ko driver to exercise
HMM functionality in the kernel.

Link: https://lore.kernel.org/r/20200422195028.3684-3-rcampbell@nvidia.com
Signed-off-by: Ralph Campbell 
Signed-off-by: Jason Gunthorpe

selftests: vm: Fix 64-bit test builds for powerpc64le

2020-04-13T15:33:46+00:00

Some tests are built only for 64-bit systems. This makes
sure that these tests are built for both big and little
endian variants of powerpc64.

Fixes: 7549b3364201 ("selftests: vm: Build/Run 64bit tests only on 64bit arch")
Reviewed-by: Kamalesh Babulal 
Signed-off-by: Sandipan Das 
Tested-by: Michael Ellerman 
Signed-off-by: Shuah Khan

selftests: add MREMAP_DONTUNMAP selftest

2020-04-02T16:35:30+00:00

Add a few simple self tests for the new flag MREMAP_DONTUNMAP, they are
simple smoke tests which also demonstrate the behavior.

[akpm@linux-foundation.org: convert eight-spaces to hard tabs]
[bgeffon@google.com: v7]
  Link: http://lkml.kernel.org/r/20200221174248.244748-2-bgeffon@google.com
[akpm@linux-foundation.org: coding style fixes]
Signed-off-by: Brian Geffon 
Signed-off-by: Andrew Morton 
Cc: Vlastimil Babka 
Cc: "Michael S . Tsirkin" 
Cc: Brian Geffon 
Cc: Arnd Bergmann 
Cc: Andy Lutomirski 
Cc: Will Deacon 
Cc: Andrea Arcangeli 
Cc: Sonny Rao 
Cc: Minchan Kim 
Cc: Joel Fernandes 
Cc: Yu Zhao 
Cc: Jesse Barnes 
Cc: Nathan Chancellor 
Cc: Florian Weimer 
Cc: "Kirill A . Shutemov" 
Cc: Lokesh Gidra 
Link: http://lkml.kernel.org/r/20200218173221.237674-2-bgeffon@google.com
Signed-off-by: Linus Torvalds

selftests/vm: run_vmtests: invoke gup_benchmark with basic FOLL_PIN coverage

2020-04-02T16:35:27+00:00

It's good to have basic unit test coverage of the new FOLL_PIN behavior.
Fortunately, the gup_benchmark unit test is extremely fast (a few
milliseconds), so adding it the the run_vmtests suite is going to cause no
noticeable change in running time.

So, add two new invocations to run_vmtests:

1) Run gup_benchmark with normal get_user_pages().

2) Run gup_benchmark with pin_user_pages().  This is much like the
   first call, except that it sets FOLL_PIN.

Running these two in quick succession also provide a visual comparison of
the running times, which is convenient.

The new invocations are fairly early in the run_vmtests script, because
with test suites, it's usually preferable to put the shorter, faster tests
first, all other things being equal.

Signed-off-by: John Hubbard 
Signed-off-by: Andrew Morton 
Reviewed-by: Ira Weiny 
Cc: Jan Kara 
Cc: Jérôme Glisse 
Cc: Kirill A. Shutemov 
Cc: "Matthew Wilcox (Oracle)" 
Cc: Al Viro 
Cc: Christoph Hellwig 
Cc: Dan Williams 
Cc: Dave Chinner 
Cc: Jason Gunthorpe 
Cc: Jonathan Corbet 
Cc: Michal Hocko 
Cc: Mike Kravetz 
Cc: Shuah Khan 
Cc: Vlastimil Babka 
Link: http://lkml.kernel.org/r/20200211001536.1027652-11-jhubbard@nvidia.com
Signed-off-by: Linus Torvalds

selftests/vm: add missed tests in run_vmtests

2020-02-21T19:22:15+00:00

The commits introducing 'mlock-random-test'[1], 'map_fiex_noreplace'[2],
and 'thuge-gen'[3] have not added those in the 'run_vmtests' script and
thus the 'run_tests' command of kselftests doesn't run those.  This
commit adds those in the script.

'gup_benchmark' and 'transhuge-stress' are also not included in the
'run_vmtests', but this commit does not add those because those are for
performance measurement rather than pass/fail tests.

[1] commit 26b4224d9961 ("selftests: expanding more mlock selftest")
[2] commit 91cbacc34512 ("tools/testing/selftests/vm/map_fixed_noreplace.c: add test for MAP_FIXED_NOREPLACE")
[3] commit fcc1f2d5dd34 ("selftests: add a test program for variable huge page sizes in mmap/shmget")

Link: http://lkml.kernel.org/r/20200206085144.29126-1-sj38.park@gmail.com
Signed-off-by: SeongJae Park 
Cc: Uladzislau Rezki (Sony) 
Cc: Masami Hiramatsu 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds