linux-kernel - [PATCH 0/2] Refactor do_fault

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Message-Id: <cover.1679089214.git.lstoakes@gmail.com>
Date:   Fri, 17 Mar 2023 21:58:24 +0000
From:   Lorenzo Stoakes <lstoakes@...il.com>
To:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     David Hildenbrand <david@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Lorenzo Stoakes <lstoakes@...il.com>
Subject: [PATCH 0/2] Refactor do_fault_around()

Refactor do_fault_around() to avoid bitwise tricks and arather difficult to
follow logic.  Additionally, prefer fault_around_pages to
fault_around_bytes as the operations are performed at a base page
granularity.

I have run this code against a small program I wrote which generates
significant input data and compares output with the original function to
ensure that it behaves the same as the old code across varying vmf, vma and
fault_around_pages inputs.

Lorenzo Stoakes (2):
  mm: refactor do_fault_around()
  mm: pefer fault_around_pages to fault_around_bytes

 mm/memory.c | 62 ++++++++++++++++++++++++++---------------------------
 1 file changed, 30 insertions(+), 32 deletions(-)

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2.39.2