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Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER |
Date: |
Thu, 28 May 2009 08:29:19 -0500 |
User-agent: |
Thunderbird 2.0.0.21 (X11/20090409) |
Paul Brook wrote:
>>>> - 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.
>
You can take it to an extreme and require bug-compatibility, but I don't
think that's necessary. I think there's room for being reasonable.
> 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.
>
I think major VM upgrades is something that can be considered
occasionally but every 6 months would be pretty painful to most users.
I think we ought to make a best effort to maintain compatibility with
older versions as long as it's reasonable.
Regards,
Anthony Liguori
> Paul
>
- [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Mark McLoughlin, 2009/05/22
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Avi Kivity, 2009/05/24
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Anthony Liguori, 2009/05/27
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Paul Brook, 2009/05/28
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Anthony Liguori, 2009/05/28
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Paul Brook, 2009/05/28
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER,
Anthony Liguori <=
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Dor Laor, 2009/05/28
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Mark McLoughlin, 2009/05/29
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Anthony Liguori, 2009/05/29
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Avi Kivity, 2009/05/31
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Anthony Liguori, 2009/05/29
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Mark McLoughlin, 2009/05/29
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Dor Laor, 2009/05/31
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Dor Laor, 2009/05/31
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Daniel P. Berrange, 2009/05/28
- Re: [Qemu-devel] [PATCH] Change virtio-console to PCI_CLASS_SERIAL_OTHER, Anthony Liguori, 2009/05/28