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From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Mark McLoughlin <markmc@redhat.com>,
	Anthony Liguori <aliguori@us.ibm.com>,
	Dor Laor <dlaor@redhat.com>,
	ajax@redhat.com
Subject: Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER
Date: Thu, 28 May 2009 14:22:51 +0100	[thread overview]
Message-ID: <200905281422.52420.paul@codesourcery.com> (raw)
In-Reply-To: <4A1E8A16.3060101@us.ibm.com>

> >>   - the device model cannot change or the guest OS will get confused
> >
> > IMHO think the only sane response is "don't do that". Trying to support
> > migration between different qemu versions just isn't worth the pain.
>
> It is very worth the pain.  I consider it a core requirement.

We disagree then. You're effectively requiring bug-compatibility.
This may be reasonable for a stable branch, but is not something I have any 
interest in across different release cycles. IMHO major VM upgrades should be 
considered the same as real hardware or firmware upgrades.

Paul

  reply	other threads:[~2009-05-28 13:23 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-22 17:14 [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER Mark McLoughlin
2009-05-24  9:11 ` Avi Kivity
2009-05-27 14:21 ` Anthony Liguori
2009-05-27 17:42   ` Mark McLoughlin
2009-05-27 22:37     ` Anthony Liguori
2009-05-28  9:33       ` Mark McLoughlin
2009-05-28  9:44         ` Anthony Liguori
2009-05-28 12:53     ` Paul Brook
2009-05-28 12:56       ` Anthony Liguori
2009-05-28 13:22         ` Paul Brook [this message]
2009-05-28 13:29           ` Anthony Liguori
2009-05-28 21:45             ` Dor Laor
2009-05-29  9:43               ` Mark McLoughlin
2009-05-29  9:50                 ` Anthony Liguori
2009-05-31 14:32                   ` Avi Kivity
2009-05-29  9:55                 ` Anthony Liguori
2009-05-29 10:09                 ` Mark McLoughlin
2009-05-31 14:47                   ` Dor Laor
2009-06-02  8:49                     ` Mark McLoughlin
2009-06-02 13:08                       ` Dor Laor
2009-06-02 13:39                         ` Mark McLoughlin
2009-05-31 14:35                 ` Dor Laor
2009-06-02  8:49                   ` Mark McLoughlin
2009-05-28 13:04       ` Daniel P. Berrange
2009-05-28 13:19         ` Anthony Liguori
2009-05-31 18:48           ` Jamie Lokier
2009-05-28 13:20         ` Paul Brook

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