linux-kernel - [PATCH 0/5] mm/mremap.c: cleanup move_page

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Message-Id: <20200117232254.2792-1-richardw.yang@linux.intel.com>
Date:   Sat, 18 Jan 2020 07:22:49 +0800
From:   Wei Yang <richardw.yang@...ux.intel.com>
To:     akpm@...ux-foundation.org, dan.j.williams@...el.com,
        aneesh.kumar@...ux.ibm.com, kirill@...temov.name,
        yang.shi@...ux.alibaba.com, richardw.yang@...ux.intel.com,
        thellstrom@...are.com
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 0/5] mm/mremap.c: cleanup move_page_tables() a little

move_page_tables() tries to move page table by PMD or PTE.

The root reason is if it tries to move PMD, both old and new range should
be PMD aligned. But current code calculate old range and new range
separately.  This leads to some redundant check and calculation.

This cleanup tries to consolidate the range check in one place to reduce
some extra range handling.

Wei Yang (5):
  mm/mremap: format the check in move_normal_pmd() same as
    move_huge_pmd()
  mm/mremap: it is sure to have enough space when extent meets
    requirement
  mm/mremap: use pmd_addr_end to calculate next in move_page_tables()
  mm/mremap: calculate extent in one place
  mm/mremap: start addresses are properly aligned

 include/linux/huge_mm.h |  2 +-
 mm/huge_memory.c        |  8 +-------
 mm/mremap.c             | 24 +++++++-----------------
 3 files changed, 9 insertions(+), 25 deletions(-)

-- 
2.17.1