From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
kvm-devel <kvm@vger.kernel.org>,
Jan Kiszka <jan.kiszka@siemens.com>,
qemu-devel <qemu-devel@nongnu.org>,
Zhi Yong Wu <wuzhy@cn.ibm.com>,
Anthony Liguori <aliguori@linux.vnet.ibm.com>,
target-devel <target-devel@vger.kernel.org>,
lf-virt <virtualization@lists.linux-foundation.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 0/5] vhost-scsi: Add support for host virtualized target
Date: Mon, 28 Jan 2013 14:29:23 +0100 [thread overview]
Message-ID: <51067D33.5080609@redhat.com> (raw)
In-Reply-To: <20130128131133.GA15108@redhat.com>
Il 28/01/2013 14:11, Michael S. Tsirkin ha scritto:
> > I asked for a standalone device because the configuration mechanism
> > (configfs vs. command-line) and the feature set are completely
> > different. Unlike virtio-net, it's not possible to switch one to the
> > other at run time.
>
> Exactly the same applies to any other frontend option.
> For example if you have two qemu instances with
> different num_queues values you can not migrate one
> to the other.
> So in this sense it is not different from any other
> frontend option, right?
Indeed, in this sense it is not.
Actually in this case migrating one to the other could succeed, and make
all disks disappear on the destination (because of the different
configuration mechanism). That however could be overcome with vhost=on
registering a migration blocker.
I won't really block the patch with the vhost=on/off frontend option if
it is properly done (e.g. the QEMU SCSI bus should not be created for
vhost=on) and minimally invasive to the non-vhost code.
Paolo
next prev parent reply other threads:[~2013-01-28 13:29 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1347000499-28701-1-git-send-email-nab@linux-iscsi.org>
2012-09-07 6:48 ` [PATCH 1/5] monitor: Rename+move net_handle_fd_param -> monitor_handle_fd_param Nicholas A. Bellinger
2012-09-07 6:48 ` [PATCH 2/5] vhost: Pass device path to vhost_dev_init() Nicholas A. Bellinger
2012-09-07 6:48 ` [PATCH 3/5] vhost-scsi: add -vhost-scsi host device for use with tcm-vhost Nicholas A. Bellinger
2012-09-07 6:48 ` [PATCH 4/5] virtio-scsi: Add start/stop functionality for vhost-scsi Nicholas A. Bellinger
2012-09-07 6:48 ` [PATCH 5/5] virtio-scsi: Set max_target=0 during vhost-scsi operation Nicholas A. Bellinger
[not found] ` <1347000499-28701-5-git-send-email-nab@linux-iscsi.org>
2012-09-07 16:00 ` [PATCH 4/5] virtio-scsi: Add start/stop functionality for vhost-scsi Paolo Bonzini
2012-09-07 19:23 ` Nicholas A. Bellinger
2012-09-07 20:30 ` Paolo Bonzini
2012-09-08 22:40 ` Michael S. Tsirkin
2012-09-10 6:16 ` Paolo Bonzini
2012-09-10 6:24 ` Michael S. Tsirkin
2012-09-10 6:42 ` Paolo Bonzini
[not found] ` <504D8BC7.8070900@redhat.com>
2012-09-10 6:49 ` Michael S. Tsirkin
2012-09-11 13:46 ` Anthony Liguori
[not found] ` <504F40BA.7020800@us.ibm.com>
2012-09-11 15:07 ` Michael S. Tsirkin
2012-09-13 22:27 ` Nicholas A. Bellinger
[not found] ` <1347575263.7359.76.camel@haakon2.linux-iscsi.org>
2012-09-14 6:45 ` Paolo Bonzini
2012-09-14 12:34 ` Michael S. Tsirkin
2012-09-14 12:50 ` Michael S. Tsirkin
2012-09-11 4:36 ` [PATCH 0/5] vhost-scsi: Add support for host virtualized target Asias He
2012-09-13 20:12 ` Nicholas A. Bellinger
[not found] ` <1347567129.7359.14.camel@haakon2.linux-iscsi.org>
2012-09-14 8:21 ` Paolo Bonzini
2013-01-17 16:43 ` Michael S. Tsirkin
[not found] ` <20130117164314.GA19458@redhat.com>
2013-01-17 21:07 ` Nicholas A. Bellinger
[not found] ` <1358456841.18551.48.camel@haakon2.linux-iscsi.org>
2013-01-21 8:50 ` Michael S. Tsirkin
2013-01-28 13:01 ` Paolo Bonzini
2013-01-28 13:11 ` Michael S. Tsirkin
2013-01-28 13:29 ` Paolo Bonzini [this message]
2013-01-28 13:36 ` Michael S. Tsirkin
2013-01-28 13:33 ` Paolo Bonzini
2013-01-28 13:39 ` Michael S. Tsirkin
2013-01-29 19:19 ` Nicholas A. Bellinger
2013-01-21 13:28 ` Anthony Liguori
2013-04-02 3:28 ` [Qemu-devel] " Wenchao Xia
[not found] ` <515A5046.7020704@linux.vnet.ibm.com>
2013-04-02 5:07 ` Nicholas A. Bellinger
[not found] <283294038.12408771.1359493421588.JavaMail.root@redhat.com>
2013-01-29 22:38 ` Nicholas A. Bellinger
[not found] <1359487188.23290.1434.camel@haakon2.linux-iscsi.org>
2013-01-29 21:03 ` Paolo Bonzini
2012-09-07 6:48 Nicholas A. Bellinger
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