linux-kernel - [PATCH 0/4] mm: mlock: fix some locked

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Date:   Tue, 30 Aug 2016 18:59:37 +0800
From:   wei.guo.simon@...il.com
To:     linux-mm@...ck.org
Cc:     Alexey Klimov <klimov.linux@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Eric B Munson <emunson@...mai.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        Mel Gorman <mgorman@...hsingularity.net>,
        Michal Hocko <mhocko@...e.com>, Shuah Khan <shuah@...nel.org>,
        Simon Guo <wei.guo.simon@...il.com>,
        Thierry Reding <treding@...dia.com>,
        Vlastimil Babka <vbabka@...e.cz>
Subject: [PATCH 0/4] mm: mlock: fix some locked_vm counting issues

From: Simon Guo <wei.guo.simon@...il.com>

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