Return-Path: Received: from fieldses.org ([173.255.197.46]:52602 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750938AbdITQjN (ORCPT ); Wed, 20 Sep 2017 12:39:13 -0400 Date: Wed, 20 Sep 2017 12:39:13 -0400 From: "J. Bruce Fields" To: "Daniel P. Berrange" Cc: Chuck Lever , Stefan Hajnoczi , Steve Dickson , Linux NFS Mailing List , Matt Benjamin , Jeff Layton Subject: Re: [PATCH nfs-utils v3 00/14] add NFS over AF_VSOCK support Message-ID: <20170920163913.GE14329@fieldses.org> References: <20170919093140.GF9536@redhat.com> <67608054-B771-44F4-8B2F-5F7FDC506CDD@oracle.com> <20170919151051.GS9536@redhat.com> <3534278B-FC7B-4AA5-AF86-92AA19BFD1DC@oracle.com> <20170919164427.GV9536@redhat.com> <20170919204224.GA14329@fieldses.org> <37604438-9848-47CA-8884-8FD6292EAFC9@oracle.com> <20170920131641.GC14329@fieldses.org> <20170920145849.GF9947@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20170920145849.GF9947@redhat.com> Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, Sep 20, 2017 at 03:58:49PM +0100, Daniel P. Berrange wrote: > FWIW, the current virtio-9p filesystem passthrough does not support > migration and still has found usage in a number of scenarios where > that limitation is not important. ClearContainers / libvirt sandbox > are two which use 9p and don't care about migration. With this in mind, > NFS-over-VSOCK would still be valuable even if the specification > explicitly stated that live migration is not permitted. > > If there was a specified way of supporting live migration with good > semantics of the guest FS, then that would open up NFS-over-VSOCK to > a wider range of use cases. Migration would likely be quite important > to OpenStack usage, since live migration is the way cloud providers > typically upgrade virt hosts to newer releases of OpenStack software. Exactly what I was curious about, thanks! --b.