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Message-ID: <cb695e26-350a-0857-5430-b7e4f81607b1@redhat.com>
Date:   Fri, 5 Aug 2022 10:10:20 +0200
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Subject: Re: [PATCH v2 1/2] mm/gup.c: Don't pass gup_flags to
 check_and_migrate_movable_pages()
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To:     Alistair Popple <apopple@nvidia.com>, linux-mm@kvack.org
Cc:     akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
        "Sierra Guiza, Alejandro (Alex)" <alex.sierra@amd.com>,
        Chaitanya Kulkarni <kch@nvidia.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Felix Kuehling <Felix.Kuehling@amd.com>,
        Jason Gunthorpe <jgg@nvidia.com>,
        John Hubbard <jhubbard@nvidia.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Miaohe Lin <linmiaohe@huawei.com>,
        Muchun Song <songmuchun@bytedance.com>,
        Ralph Campbell <rcampbell@nvidia.com>
References: <3e20a542e756bbc0f66435c9344ff674f3ff7ac7.1659680600.git-series.apopple@nvidia.com>
From:   David Hildenbrand <david@redhat.com>
Organization: Red Hat
In-Reply-To: <3e20a542e756bbc0f66435c9344ff674f3ff7ac7.1659680600.git-series.apopple@nvidia.com>
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On 05.08.22 08:29, Alistair Popple wrote:
> gup_flags is passed to check_and_migrate_movable_pages() so that it can
> call either put_page() or unpin_user_page() to drop the page reference.
> However check_and_migrate_movable_pages() is only called for
> FOLL_LONGTERM, which implies FOLL_PIN so there is no need to pass
> gup_flags.
> 
> Signed-off-by: Alistair Popple <apopple@nvidia.com>
> ---
>  mm/gup.c | 21 ++++++++-------------
>  1 file changed, 8 insertions(+), 13 deletions(-)

Reviewed-by: David Hildenbrand <david@redhat.com>


-- 
Thanks,

David / dhildenb