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[85.223.141.74]) by smtp.gmail.com with ESMTPSA id u11sm1583705ljo.17.2019.10.27.23.25.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 27 Oct 2019 23:25:20 -0700 (PDT) Subject: Re: [Xen-devel] [PATCH hmm 08/15] xen/gntdev: Use select for DMA_SHARED_BUFFER To: Jason Gunthorpe , Oleksandr Andrushchenko , =?UTF-8?B?SsO8cmdlbiBHcm/Dnw==?= , Boris Ostrovsky Cc: Andrea Arcangeli , Ralph Campbell , Stefano Stabellini , "linux-rdma@vger.kernel.org" , John Hubbard , "Felix.Kuehling@amd.com" , "amd-gfx@lists.freedesktop.org" , "linux-mm@kvack.org" , Jerome Glisse , "dri-devel@lists.freedesktop.org" , "xen-devel@lists.xenproject.org" , Ben Skeggs References: <20191015181242.8343-1-jgg@ziepe.ca> <20191015181242.8343-9-jgg@ziepe.ca> <6f60f558-20db-1749-044d-a46697258c39@suse.com> <91329d7d-9db5-057e-59d2-887254083da0@epam.com> <20191021191219.GJ6285@mellanox.com> From: Oleksandr Andrushchenko Message-ID: <3a53baa5-bc1d-e901-2792-8d51753391ff@gmail.com> Date: Mon, 28 Oct 2019 08:25:19 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191021191219.GJ6285@mellanox.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 10/21/19 10:12 PM, Jason Gunthorpe wrote: > On Wed, Oct 16, 2019 at 06:35:15AM +0000, Oleksandr Andrushchenko wrote= : >> On 10/16/19 8:11 AM, J=C3=BCrgen Gro=C3=9F wrote: >>> On 15.10.19 20:12, Jason Gunthorpe wrote: >>>> From: Jason Gunthorpe >>>> >>>> DMA_SHARED_BUFFER can not be enabled by the user (it represents a >>>> library >>>> set in the kernel). The kconfig convention is to use select for such >>>> symbols so they are turned on implicitly when the user enables a kco= nfig >>>> that needs them. >>>> >>>> Otherwise the XEN_GNTDEV_DMABUF kconfig is overly difficult to enabl= e. >>>> >>>> Fixes: 932d6562179e ("xen/gntdev: Add initial support for dma-buf UA= PI") >>>> Cc: Oleksandr Andrushchenko >>>> Cc: Boris Ostrovsky >>>> Cc: xen-devel@lists.xenproject.org >>>> Cc: Juergen Gross >>>> Cc: Stefano Stabellini >>>> Signed-off-by: Jason Gunthorpe >>> Reviewed-by: Juergen Gross >>> >> Reviewed-by: Oleksandr Andrushchenko > Thanks Oleksandr and Juergen, can you also give me some advice on how > to progress the more complex patch: > > https://patchwork.kernel.org/patch/11191369/ > > Is this gntdev stuff still in-use? I struggled a bit to understand > what it is doing, but I think I made a reasonable guess? I think Jurgen and Boris could help here > Jason > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xenproject.org > https://lists.xenproject.org/mailman/listinfo/xen-devel