From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50227) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF6GU-0002Nm-5P for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:39:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gF6GQ-000529-Ow for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:39:10 -0400 Received: from [185.30.24.106] (port=12318 helo=hotspot.internet-for-guests.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gF6GP-0004rA-Jw for qemu-devel@nongnu.org; Tue, 23 Oct 2018 19:39:06 -0400 Date: Tue, 23 Oct 2018 19:39:00 -0400 From: "Michael S. Tsirkin" Message-ID: <20181023193613-mutt-send-email-mst@kernel.org> References: <1516003315-17878-1-git-send-email-changpeng.liu@intel.com> <1516003315-17878-2-git-send-email-changpeng.liu@intel.com> <7711f157-5863-fc75-0730-a631362ffd06@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7711f157-5863-fc75-0730-a631362ffd06@redhat.com> Subject: Re: [Qemu-devel] [RFC v1] block/NVMe: introduce a new vhost NVMe host device to QEMU List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: Changpeng Liu , qemu-devel@nongnu.org, james.r.harris@intel.com, keith.busch@intel.com, famz@redhat.com, stefanha@gmail.com, stefanha@redhat.com On Tue, Jan 16, 2018 at 06:06:56PM +0100, Paolo Bonzini wrote: > Second, virtio-based vhost-user remains QEMU's preferred method for > high-performance I/O in guests. Discard support is missing and that is > important for SSDs; that should be fixed in the virtio spec. BTW could you reply on the thread of the patch virtio_blk: add discard and write zeroes support Christoph Hellwig thinks we should change the spec and defer implementation until we do. What's your take on this? -- MST