linux-kernel - [PATCH v2 0/2] mm/migrate: optimize migrate_vma

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Date:   Fri, 10 Jul 2020 12:48:38 -0700
From:   Ralph Campbell <rcampbell@...dia.com>
To:     <linux-mm@...ck.org>, <kvm-ppc@...r.kernel.org>,
        <linux-kselftest@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     Jerome Glisse <jglisse@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Christoph Hellwig <hch@....de>,
        Jason Gunthorpe <jgg@...lanox.com>,
        "Bharata B Rao" <bharata@...ux.ibm.com>,
        Shuah Khan <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ralph Campbell <rcampbell@...dia.com>
Subject: [PATCH v2 0/2] mm/migrate: optimize migrate_vma_setup() for holes

A simple optimization for migrate_vma_*() when the source vma is not an
anonymous vma and a new test case to exercise it.
This is based on linux-mm and is for Andrew Morton's tree.

Changes in v2:
Do the same check for vma_is_anonymous() for pte_none().
Don't increment cpages if the page isn't migrating.

Ralph Campbell (2):
  mm/migrate: optimize migrate_vma_setup() for holes
  mm/migrate: add migrate-shared test for migrate_vma_*()

 mm/migrate.c                           | 16 ++++++++++--
 tools/testing/selftests/vm/hmm-tests.c | 35 ++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 2 deletions(-)

-- 
2.20.1