Return-Path: Received: from fieldses.org ([173.255.197.46]:52440 "EHLO fieldses.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751732AbdITOp6 (ORCPT ); Wed, 20 Sep 2017 10:45:58 -0400 Date: Wed, 20 Sep 2017 10:45:57 -0400 From: "J. Bruce Fields" To: Chuck Lever Cc: "Daniel P. Berrange" , 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: <20170920144557.GD14329@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-nfs-owner@vger.kernel.org List-ID: On Wed, Sep 20, 2017 at 10:40:45AM -0400, Chuck Lever wrote: > File handles suddenly change and lock state vanishes after a live > migration event, both of which would be catastrophic for hypervisor > mount points. They're talking about a Ganesha/Ceph backend. It should be able to preserve filehandles. Lock migration will require server-side implementation work but not protocol changes that I'm aware of. It could be a lot of implementation work, though. --b.