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Re: [Xen-devel] [PATCH 0/9] Use vm_insert_range


  • To: Souptick Joarder <jrdr.linux@xxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxx>, Michal Hocko <mhocko@xxxxxxxx>, "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>, vbabka@xxxxxxx, Rik van Riel <riel@xxxxxxxxxxx>, Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>, rppt@xxxxxxxxxxxxxxxxxx, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx>, robin.murphy@xxxxxxx, iamjoonsoo.kim@xxxxxxx, treding@xxxxxxxxxx, Kees Cook <keescook@xxxxxxxxxxxx>, Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>, stefanr@xxxxxxxxxxxxxxxxx, hjc@xxxxxxxxxxxxxx, Heiko Stuebner <heiko@xxxxxxxxx>, airlied@xxxxxxxx, oleksandr_andrushchenko@xxxxxxxx, joro@xxxxxxxxxx, pawel@xxxxxxxxxx, Kyungmin Park <kyungmin.park@xxxxxxxxxxx>, mchehab@xxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx>
  • From: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
  • Date: Wed, 21 Nov 2018 14:37:24 -0500
  • Autocrypt: addr=boris.ostrovsky@xxxxxxxxxx; prefer-encrypt=mutual; keydata= xsFNBFH8CgsBEAC0KiOi9siOvlXatK2xX99e/J3OvApoYWjieVQ9232Eb7GzCWrItCzP8FUV PQg8rMsSd0OzIvvjbEAvaWLlbs8wa3MtVLysHY/DfqRK9Zvr/RgrsYC6ukOB7igy2PGqZd+M MDnSmVzik0sPvB6xPV7QyFsykEgpnHbvdZAUy/vyys8xgT0PVYR5hyvhyf6VIfGuvqIsvJw5 C8+P71CHI+U/IhsKrLrsiYHpAhQkw+Zvyeml6XSi5w4LXDbF+3oholKYCkPwxmGdK8MUIdkM d7iYdKqiP4W6FKQou/lC3jvOceGupEoDV9botSWEIIlKdtm6C4GfL45RD8V4B9iy24JHPlom woVWc0xBZboQguhauQqrBFooHO3roEeM1pxXjLUbDtH4t3SAI3gt4dpSyT3EvzhyNQVVIxj2 FXnIChrYxR6S0ijSqUKO0cAduenhBrpYbz9qFcB/GyxD+ZWY7OgQKHUZMWapx5bHGQ8bUZz2 SfjZwK+GETGhfkvNMf6zXbZkDq4kKB/ywaKvVPodS1Poa44+B9sxbUp1jMfFtlOJ3AYB0WDS Op3d7F2ry20CIf1Ifh0nIxkQPkTX7aX5rI92oZeu5u038dHUu/dO2EcuCjl1eDMGm5PLHDSP 0QUw5xzk1Y8MG1JQ56PtqReO33inBXG63yTIikJmUXFTw6lLJwARAQABzTNCb3JpcyBPc3Ry b3Zza3kgKFdvcmspIDxib3Jpcy5vc3Ryb3Zza3lAb3JhY2xlLmNvbT7CwXgEEwECACIFAlH8 CgsCGwMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheAAAoJEIredpCGysGyasEP/j5xApopUf4g 9Fl3UxZuBx+oduuw3JHqgbGZ2siA3EA4bKwtKq8eT7ekpApn4c0HA8TWTDtgZtLSV5IdH+9z JimBDrhLkDI3Zsx2CafL4pMJvpUavhc5mEU8myp4dWCuIylHiWG65agvUeFZYK4P33fGqoaS VGx3tsQIAr7MsQxilMfRiTEoYH0WWthhE0YVQzV6kx4wj4yLGYPPBtFqnrapKKC8yFTpgjaK jImqWhU9CSUAXdNEs/oKVR1XlkDpMCFDl88vKAuJwugnixjbPFTVPyoC7+4Bm/FnL3iwlJVE qIGQRspt09r+datFzPqSbp5Fo/9m4JSvgtPp2X2+gIGgLPWp2ft1NXHHVWP19sPgEsEJXSr9 tskM8ScxEkqAUuDs6+x/ISX8wa5Pvmo65drN+JWA8EqKOHQG6LUsUdJolFM2i4Z0k40BnFU/ kjTARjrXW94LwokVy4x+ZYgImrnKWeKac6fMfMwH2aKpCQLlVxdO4qvJkv92SzZz4538az1T m+3ekJAimou89cXwXHCFb5WqJcyjDfdQF857vTn1z4qu7udYCuuV/4xDEhslUq1+GcNDjAhB nNYPzD+SvhWEsrjuXv+fDONdJtmLUpKs4Jtak3smGGhZsqpcNv8nQzUGDQZjuCSmDqW8vn2o hWwveNeRTkxh+2x1Qb3GT46uzsFNBFH8CgsBEADGC/yx5ctcLQlB9hbq7KNqCDyZNoYu1HAB Hal3MuxPfoGKObEktawQPQaSTB5vNlDxKihezLnlT/PKjcXC2R1OjSDinlu5XNGc6mnky03q yymUPyiMtWhBBftezTRxWRslPaFWlg/h/Y1iDuOcklhpr7K1h1jRPCrf1yIoxbIpDbffnuyz kuto4AahRvBU4Js4sU7f/btU+h+e0AcLVzIhTVPIz7PM+Gk2LNzZ3/on4dnEc/qd+ZZFlOQ4 KDN/hPqlwA/YJsKzAPX51L6Vv344pqTm6Z0f9M7YALB/11FO2nBB7zw7HAUYqJeHutCwxm7i BDNt0g9fhviNcJzagqJ1R7aPjtjBoYvKkbwNu5sWDpQ4idnsnck4YT6ctzN4I+6lfkU8zMzC gM2R4qqUXmxFIS4Bee+gnJi0Pc3KcBYBZsDK44FtM//5Cp9DrxRQOh19kNHBlxkmEb8kL/pw XIDcEq8MXzPBbxwHKJ3QRWRe5jPNpf8HCjnZz0XyJV0/4M1JvOua7IZftOttQ6KnM4m6WNIZ 2ydg7dBhDa6iv1oKdL7wdp/rCulVWn8R7+3cRK95SnWiJ0qKDlMbIN8oGMhHdin8cSRYdmHK kTnvSGJNlkis5a+048o0C6jI3LozQYD/W9wq7MvgChgVQw1iEOB4u/3FXDEGulRVko6xCBU4 SQARAQABwsFfBBgBAgAJBQJR/AoLAhsMAAoJEIredpCGysGyfvMQAIywR6jTqix6/fL0Ip8G jpt3uk//QNxGJE3ZkUNLX6N786vnEJvc1beCu6EwqD1ezG9fJKMl7F3SEgpYaiKEcHfoKGdh 30B3Hsq44vOoxR6zxw2B/giADjhmWTP5tWQ9548N4VhIZMYQMQCkdqaueSL+8asp8tBNP+TJ PAIIANYvJaD8xA7sYUXGTzOXDh2THWSvmEWWmzok8er/u6ZKdS1YmZkUy8cfzrll/9hiGCTj u3qcaOM6i/m4hqtvsI1cOORMVwjJF4+IkC5ZBoeRs/xW5zIBdSUoC8L+OCyj5JETWTt40+lu qoqAF/AEGsNZTrwHJYu9rbHH260C0KYCNqmxDdcROUqIzJdzDKOrDmebkEVnxVeLJBIhYZUd t3Iq9hdjpU50TA6sQ3mZxzBdfRgg+vaj2DsJqI5Xla9QGKD+xNT6v14cZuIMZzO7w0DoojM4 ByrabFsOQxGvE0w9Dch2BDSI2Xyk1zjPKxG1VNBQVx3flH37QDWpL2zlJikW29Ws86PHdthh Fm5PY8YtX576DchSP6qJC57/eAAe/9ztZdVAdesQwGb9hZHJc75B+VNm4xrh/PJO6c1THqdQ 19WVJ+7rDx3PhVncGlbAOiiiE3NOFPJ1OQYxPKtpBUukAlOTnkKE6QcA4zckFepUkfmBV1wM Jg6OxFYd01z+a+oL
  • Cc: linux-rockchip@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, Linux-MM <linux-mm@xxxxxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux1394-devel@xxxxxxxxxxxxxxxxxxxxx, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, linux-media@xxxxxxxxxxxxxxx
  • Delivery-date: Wed, 21 Nov 2018 19:39:06 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 11/21/18 1:24 AM, Souptick Joarder wrote:
> On Thu, Nov 15, 2018 at 9:09 PM Souptick Joarder <jrdr.linux@xxxxxxxxx> wrote:
>> Previouly drivers have their own way of mapping range of
>> kernel pages/memory into user vma and this was done by
>> invoking vm_insert_page() within a loop.
>>
>> As this pattern is common across different drivers, it can
>> be generalized by creating a new function and use it across
>> the drivers.
>>
>> vm_insert_range is the new API which will be used to map a
>> range of kernel memory/pages to user vma.
>>
>> All the applicable places are converted to use new vm_insert_range
>> in this patch series.
>>
>> Souptick Joarder (9):
>>   mm: Introduce new vm_insert_range API
>>   arch/arm/mm/dma-mapping.c: Convert to use vm_insert_range
>>   drivers/firewire/core-iso.c: Convert to use vm_insert_range
>>   drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range
>>   drm/xen/xen_drm_front_gem.c: Convert to use vm_insert_range
>>   iommu/dma-iommu.c: Convert to use vm_insert_range
>>   videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range
>>   xen/gntdev.c: Convert to use vm_insert_range
>>   xen/privcmd-buf.c: Convert to use vm_insert_range
> Any further comment on driver changes ?

Xen drivers (the last two patches) look fine to me.

-boris


>>  arch/arm/mm/dma-mapping.c                         | 21 ++++++-----------
>>  drivers/firewire/core-iso.c                       | 15 ++----------
>>  drivers/gpu/drm/rockchip/rockchip_drm_gem.c       | 20 ++--------------
>>  drivers/gpu/drm/xen/xen_drm_front_gem.c           | 20 +++++-----------
>>  drivers/iommu/dma-iommu.c                         | 12 ++--------
>>  drivers/media/common/videobuf2/videobuf2-dma-sg.c | 23 ++++++-------------
>>  drivers/xen/gntdev.c                              | 11 ++++-----
>>  drivers/xen/privcmd-buf.c                         |  8 ++-----
>>  include/linux/mm_types.h                          |  3 +++
>>  mm/memory.c                                       | 28 
>> +++++++++++++++++++++++
>>  mm/nommu.c                                        |  7 ++++++
>>  11 files changed, 70 insertions(+), 98 deletions(-)
>>
>> --
>> 1.9.1
>>


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