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Tsirkin" Cc: akpm@linux-foundation.org, linux-mm@kvack.org, virtualization@lists.linux-foundation.org References: <20201019145623.671-1-xieyongji@bytedance.com> <20201019130815-mutt-send-email-mst@kernel.org> From: Jason Wang Message-ID: <192da6ad-2660-896a-bc94-d30fbd38873d@redhat.com> Date: Tue, 20 Oct 2020 10:20:54 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.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 2020/10/20 =E4=B8=8A=E5=8D=8810:18, =E8=B0=A2=E6=B0=B8=E5=90=89 wrote: > > > > How does this driver compare with vhost-user-blk (which doesn't > need kernel support)? > > > We want to implement a block device rather than a virtio-blk=20 > dataplane. And with this driver's help, the vhost-user-blk process=20 > could provide storage service to all APPs in the host. > > Thanks, > Yongji I guess the point is that, with the help of VDUSE, besides vhost-vDPA=20 for VM, you can have a kernel virtio interface through virtio-vdpa which=20 can not be done in vhost-user-blk. Thanks