linux-stable.git/tools/testing/selftests/vm/Makefile, branch linux-4.9.y

userfaultfd: selftest: vm: allow to build in vm/ directory

2017-12-20T09:07:18+00:00

[ Upstream commit 46aa6a302b53f543f8e8b8e1714dc5e449ad36a6 ]

linux/tools/testing/selftests/vm $ make

  gcc -Wall -I ../../../../usr/include     compaction_test.c -lrt -o /compaction_test
  /usr/lib/gcc/x86_64-pc-linux-gnu/4.9.4/../../../../x86_64-pc-linux-gnu/bin/ld: cannot open output file /compaction_test: Permission denied
  collect2: error: ld returned 1 exit status
  make: *** [../lib.mk:54: /compaction_test] Error 1

Since commit a8ba798bc8ec ("selftests: enable O and KBUILD_OUTPUT")
selftests/vm build fails if run from the "selftests/vm" directory, but
it works in the selftests/ directory.  It's quicker to be able to do a
local vm-only build after a tree wipe and this patch allows for it
again.

Link: http://lkml.kernel.org/r/20170302173738.18994-4-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli 
Cc: Mike Rapoport 
Cc: "Dr. David Alan Gilbert" 
Cc: Mike Kravetz 
Cc: Pavel Emelyanov 
Cc: Hillf Danton 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

selftests: expanding more mlock selftest

2016-10-08T01:46:28+00:00

This patch will randomly perform mlock/mlock2 on a given memory region,
and verify the RLIMIT_MEMLOCK limitation works properly.

Suggested-by: David Rientjes 
Link: http://lkml.kernel.org/r/1473325970-11393-4-git-send-email-wei.guo.simon@gmail.com
Signed-off-by: Simon Guo 
Cc: Shuah Khan 
Cc: Vlastimil Babka 
Cc: "Kirill A. Shutemov" 
Cc: Michal Hocko 
Cc: Eric B Munson 
Cc: Simon Guo 
Cc: Mel Gorman 
Cc: Alexey Klimov 
Cc: Andrea Arcangeli 
Cc: Thierry Reding 
Cc: Mike Kravetz 
Cc: Geert Uytterhoeven 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests/vm: add test for mlock() when areas are intersected

2016-10-08T01:46:28+00:00

This patch adds mlock() test for multiple invocation on the same address
area, and verify it doesn't mess the rlimit mlock limitation.

Link: http://lkml.kernel.org/r/1472554781-9835-5-git-send-email-wei.guo.simon@gmail.com
Signed-off-by: Simon Guo 
Cc: Alexey Klimov 
Cc: Eric B Munson 
Cc: Geert Uytterhoeven 
Cc: "Kirill A. Shutemov" 
Cc: Mel Gorman 
Cc: Michal Hocko 
Cc: Shuah Khan 
Cc: Simon Guo 
Cc: Thierry Reding 
Cc: Vlastimil Babka 
Cc: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

selftests: vm: add tests for lock on fault

2015-11-06T03:34:48+00:00

Test the mmap() flag, and the mlockall() flag.  These tests ensure that
pages are not faulted in until they are accessed, that the pages are
unevictable once faulted in, and that VMA splitting and merging works with
the new VM flag.  The second test ensures that mlock limits are respected.
 Note that the limit test needs to be run a normal user.

Also add tests to use the new mlock2 family of system calls.

[treding@nvidia.com: : Fix mlock2-tests for 32-bit architectures]
[treding@nvidia.com: ensure the mlock2 syscall number can be found]
[treding@nvidia.com: use the right arguments for main()]
Signed-off-by: Eric B Munson 
Cc: Shuah Khan 
Cc: Michal Hocko 
Cc: Vlastimil Babka 
Cc: Jonathan Corbet 
Cc: Catalin Marinas 
Cc: Geert Uytterhoeven 
Cc: Guenter Roeck 
Cc: Heiko Carstens 
Cc: Kirill A. Shutemov 
Cc: Michael Kerrisk 
Cc: Ralf Baechle 
Cc: Stephen Rothwell 
Signed-off-by: Thierry Reding 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftest: headers fixup

2015-09-22T22:09:53+00:00

Depend on "make headers_install" to create proper headers to include and
provide syscall numbers.

Signed-off-by: Andrea Arcangeli 
Cc: Dr. David Alan Gilbert 
Cc: Michael Ellerman 
Cc: Shuah Khan 
Cc: Thierry Reding 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftests: vm: pick up sanitized kernel headers

2015-09-22T22:09:53+00:00

Add the usr/include subdirectory of the top-level tree to the include
path, and make sure to include headers without relative paths to make
sure the sanitized headers get picked up.  Otherwise the compiler will
not be able to find the linux/compiler.h header included by the non-
sanitized include/uapi/linux/userfaultfd.h.

While at it, make sure to only hardcode the syscall numbers on x86 and
PowerPC if they haven't been properly picked up from the headers.

Signed-off-by: Thierry Reding 
Acked-by: Michael Ellerman 
Cc: Shuah Khan 
Signed-off-by: Andrea Arcangeli 
Cc: Dr. David Alan Gilbert 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Revert "selftests: add hugetlbfstest"

2015-09-08T22:35:28+00:00

This manually reverts 7e50533d4b842 ("selftests: add hugetlbfstest").

The hugetlbfstest test depends on hugetlb pages being counted in a
task's rss.  This functionality is not in the kernel, so the test will
always fail.  Remove test to avoid confusion.

Signed-off-by: Mike Kravetz 
Acked-by: Naoya Horiguchi 
Cc: Joern Engel 
Cc: Davidlohr Bueso 
Cc: David Rientjes 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

userfaultfd: selftest

2015-09-04T23:54:41+00:00

This test allocates two virtual areas and bounces the physical memory
across the two virtual areas using only userfaultfd.

Signed-off-by: Andrea Arcangeli 
Cc: Pavel Emelyanov 
Cc: Dave Hansen 
Cc: Linus Torvalds 
Cc: Shuah Khan 
Cc: Shuah Khan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Test compaction of mlocked memory

2015-05-26T21:58:06+00:00

Commit commit 5bbe3547aa3b ("mm: allow compaction of unevictable pages")
introduced a sysctl that allows userspace to enable scanning of locked
pages for compaction.  This patch introduces a new test which fragments
main memory and attempts to allocate a number of huge pages to exercise
this compaction logic.

Tested on machines with up to 32 GB RAM. With the patch a much larger
number of huge pages can be allocated than on the kernel without the
patch.

Example output:
On a machine with 16 GB RAM:
sudo make run_tests vm
...
-----------------------
running compaction_test
-----------------------
No of huge pages allocated = 3834
[PASS]
...

Signed-off-by: Sri Jayaramappa 
Cc: linux-kernel@vger.kernel.org
Cc: linux-api@vger.kernel.org
Cc: Andrew Morton 
Cc: Eric B Munson 
Reviewed-by: Eric B Munson 
Acked-by: Andrew Morton 
Signed-off-by: Shuah Khan

selftests: Set CC using CROSS_COMPILE once in lib.mk

2015-03-19T21:16:51+00:00

This avoids repeating the logic in every Makefile. We mimic the
top-level Makefile and use $(CROSS_COMPILE)gcc.

Signed-off-by: Michael Ellerman 
Signed-off-by: Shuah Khan