[PATCH 0/4] mm: mlock: fix some locked_vm counting issues

[wei . guo . simon]

From: Simon Guo <wei.guo.simon@xxxxxxxxx>

This patch set fixes some mlock() misbehavior when mlock()/mlock2() 
is invoked multiple times on intersect or same address regions.

And add selftest for this case.

Simon Guo (4):
  mm: mlock: check against vma for actual mlock() size
  mm: mlock: avoid increase mm->locked_vm on mlock() when already
    mlock2(,MLOCK_ONFAULT)
  selftest: split mlock2_ apis into separate mlock2.h
  selftests/vm: add test for mlock() when areas are intersected.

 mm/mlock.c                                        | 53 ++++++++++++++++
 tools/testing/selftests/vm/.gitignore             |  1 +
 tools/testing/selftests/vm/Makefile               |  4 ++
 tools/testing/selftests/vm/mlock-intersect-test.c | 76 +++++++++++++++++++++++
 tools/testing/selftests/vm/mlock2-tests.c         | 21 +------
 tools/testing/selftests/vm/mlock2.h               | 21 +++++++
 6 files changed, 156 insertions(+), 20 deletions(-)
 create mode 100644 tools/testing/selftests/vm/mlock-intersect-test.c
 create mode 100644 tools/testing/selftests/vm/mlock2.h

-- 
1.8.3.1