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From: Paolo Bonzini <pbonzini@redhat.com>
To: Anthony Liguori <aliguori@us.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>,
	linux-scsi <linux-scsi@vger.kernel.org>,
	kvm-devel <kvm@vger.kernel.org>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	lf-virt <virtualization@lists.linux-foundation.org>,
	Anthony Liguori <aliguori@linux.vnet.ibm.com>,
	target-devel <target-devel@vger.kernel.org>,
	Zhi Yong Wu <wuzhy@cn.ibm.com>, Christoph Hellwig <hch@lst.de>,
	Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Subject: Re: [RFC-v2 0/4] tcm_vhost+cmwq fabric driver code for-3.6
Date: Wed, 18 Jul 2012 15:56:02 +0200	[thread overview]
Message-ID: <5006C072.2040204@redhat.com> (raw)
In-Reply-To: <5006BD3D.7090104@us.ibm.com>

Il 18/07/2012 15:42, Anthony Liguori ha scritto:
> If you add support for a new command, you need to provide userspace a
> way to disable this command.  If you change what gets reported for VPD,
> you need to provide userspace a way to make VPD look like what it did in
> a previous version.

The QEMU target is not enforcing this to this level.  We didn't for
CD-ROM ATAPI, and we're not doing it for SCSI.

It may indeed be useful for changes to VPD pages or major features.
However, so far we've never introduced any feature that deserved it.
This is also because OSes typically don't care: they use a small subset
of the features and all the remaining "decorations" are only needed to
be pedantically compliant to the spec.

Paolo

  reply	other threads:[~2012-07-18 13:56 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-07-11 21:15 [RFC-v2 0/4] tcm_vhost+cmwq fabric driver code for-3.6 Nicholas A. Bellinger
2012-07-11 21:15 ` [RFC-v2 1/4] vhost: Separate vhost-net features from vhost features Nicholas A. Bellinger
2012-07-11 21:15 ` Nicholas A. Bellinger
2012-07-11 21:15 ` [RFC-v2 2/4] vhost: make vhost work queue visible Nicholas A. Bellinger
2012-07-11 21:15 ` Nicholas A. Bellinger
2012-07-11 21:15 ` [RFC-v2 3/4] vhost: Add vhost_scsi specific defines Nicholas A. Bellinger
2012-07-11 21:15 ` Nicholas A. Bellinger
2012-07-11 21:15 ` [RFC-v2 4/4] tcm_vhost: Initial merge for vhost level target fabric driver Nicholas A. Bellinger
2012-07-11 21:15 ` Nicholas A. Bellinger
2012-07-17 15:05 ` [RFC-v2 0/4] tcm_vhost+cmwq fabric driver code for-3.6 Michael S. Tsirkin
2012-07-17 18:55   ` Anthony Liguori
2012-07-17 19:00     ` Michael S. Tsirkin
2012-07-17 21:50     ` Nicholas A. Bellinger
2012-07-18 13:42       ` Anthony Liguori
2012-07-18 13:42       ` Anthony Liguori
2012-07-18 13:56         ` Paolo Bonzini [this message]
2012-07-18 15:33         ` Michael S. Tsirkin
2012-07-18 15:53         ` Christoph Hellwig
2012-07-18 15:53         ` Christoph Hellwig
2012-07-18 16:00           ` Michael S. Tsirkin
2012-07-18 16:42             ` Rustad, Mark D
2012-07-18 17:17               ` Michael S. Tsirkin
2012-07-18 20:12                 ` Rustad, Mark D
2012-07-18 20:12                 ` Rustad, Mark D
2012-07-18 16:42             ` Rustad, Mark D
2012-07-18 16:00           ` Anthony Liguori
2012-07-18 16:00           ` Anthony Liguori
2012-07-18 16:47             ` James Bottomley
2012-07-18 19:12               ` Anthony Liguori
2012-07-19  6:00                 ` Paolo Bonzini
2012-07-19  6:00                 ` Paolo Bonzini
2012-07-19  7:28                   ` James Bottomley
2012-07-19  7:30                     ` Paolo Bonzini
2012-07-18 19:12               ` Anthony Liguori
2012-07-18 22:45         ` Nicholas A. Bellinger
2012-07-18 22:45         ` Nicholas A. Bellinger
2012-07-17 21:17   ` Nicholas A. Bellinger
2012-07-17 21:17   ` Nicholas A. Bellinger
2012-07-17 21:34     ` Michael S. Tsirkin
2012-07-17 22:02       ` Nicholas A. Bellinger
2012-07-17 22:02       ` Nicholas A. Bellinger
2012-07-17 22:18         ` Michael S. Tsirkin
2012-07-17 22:18         ` Michael S. Tsirkin
2012-07-17 22:37           ` Nicholas A. Bellinger
2012-07-17 23:11             ` Michael S. Tsirkin
2012-07-18  0:17               ` Nicholas A. Bellinger
2012-07-17 21:58     ` Michael S. Tsirkin
2012-07-17 22:04       ` Nicholas A. Bellinger

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