From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id D61C7986668 for ; Thu, 19 Jan 2023 11:42:59 +0000 (UTC) Date: Thu, 19 Jan 2023 06:42:49 -0500 From: "Michael S. Tsirkin" Message-ID: <20230119064213-mutt-send-email-mst@kernel.org> References: <961D315C9D3A523B+202301111121345064138@sudoinfotech.com> MIME-Version: 1.0 In-Reply-To: Subject: Re: Re: [virtio-comment] About adding a new device type virtio-nvme Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable To: Stefan Hajnoczi Cc: =?utf-8?B?5L6v6Iux5LmQ?= , virtio-comment , Christoph Hellwig , Keith Busch , Kevin Wolf , Klaus Jensen , sgarzare List-ID: On Tue, Jan 17, 2023 at 11:01:37AM -0500, Stefan Hajnoczi wrote: > > The NVME technology and ecosystem are complete. However, in virtualizat= ion scenarios, NVME devices can only use PCIe pass-through . When NVME and = virtio combine to connect to the vDPA ecosystem, live migration is supporte= d. > >=20 > >=20 > > >Let's not forget that virtio-blk is widely used and new commands are > > >being added as needed. Which NVMe features are you missing in > > >virtio-blk? > >=20 > > With the introduction of the concept of DPU, a large number of vendors = are offloading virtual devices to hardware. The back-end of Virtio-blk does= not support remote storage. Therefore, Virtio-Nvme-of can well combine the= advantages of remote storage and virtio live migration >=20 > virtio-blk is just a storage interface, whether that storage is local or > remote is up to the device implementation. The block device could be > located on Ceph, NFS, etc. >=20 > Each virtio-blk device is a single block device. There is no > standardized management protocol in virtio-blk for connecting to remote > block devices. I'm aware of hardware virtio-blk devices that connect to > remote storage. Configuration is performed through an out-of-band > management interface. >=20 > Maybe when you say virtio-blk doesn't support remote storage this is > what you mean? >=20 > Stefan =E4=BE=AF=E8=8B=B1=E4=B9=90 you never answered this question. --=20 MST This publicly archived list offers a means to provide input to the OASIS Virtual I/O Device (VIRTIO) TC. In order to verify user consent to the Feedback License terms and to minimize spam in the list archive, subscription is required before posting. Subscribe: virtio-comment-subscribe@lists.oasis-open.org Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org List help: virtio-comment-help@lists.oasis-open.org List archive: https://lists.oasis-open.org/archives/virtio-comment/ Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lis= ts Committee: https://www.oasis-open.org/committees/virtio/ Join OASIS: https://www.oasis-open.org/join/