linux-kernel - [PATCH 0/2] x86: Fix performance regression in get_user_pages

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Date:   Sat,  9 Sep 2017 00:56:01 +0300
From:   "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ingo Molnar <mingo@...nel.org>
Cc:     x86@...nel.org, Thorsten Leemhuis <regressions@...mhuis.info>,
        Jonathan Corbet <corbet@....net>,
        Huang Ying <ying.huang@...el.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH 0/2] x86: Fix performance regression in get_user_pages_fast()

Fix performance regression found by 0-day.

Kirill A. Shutemov (2):
  mm: Add infrastructure for get_user_pages_fast() benchmarking
  mm, x86: Fix performance regression in get_user_pages_fast()

 mm/Kconfig                                 |   9 +++
 mm/Makefile                                |   1 +
 mm/gup.c                                   |  97 +++++++++++++++++-----------
 mm/gup_benchmark.c                         | 100 +++++++++++++++++++++++++++++
 tools/testing/selftests/vm/Makefile        |   1 +
 tools/testing/selftests/vm/gup_benchmark.c |  91 ++++++++++++++++++++++++++
 6 files changed, 260 insertions(+), 39 deletions(-)
 create mode 100644 mm/gup_benchmark.c
 create mode 100644 tools/testing/selftests/vm/gup_benchmark.c

-- 
2.14.1