Re: [Qemu-devel] What's the next QEMU version after 2.9 ? (or: when is a good point in time to get rid of old interfaces)

[Jason Wang <jasowang@redhat.com>]

On 2017年03月09日 16:50, Thomas Huth wrote:
> On 09.03.2017 03:21, Jason Wang wrote:
>>
>> On 2017年03月08日 19:22, Thomas Huth wrote:
>>> On 08.03.2017 11:03, Peter Maydell wrote:
>>>> On 8 March 2017 at 09:26, Thomas Huth <thuth@redhat.com> wrote:
>>>>> But anyway, the more important thing that keeps me concerned is:
>>>>> Someone
>>>>>    once told me that we should get rid of old parameters and interfaces
>>>>> (like HMP commands) primarily only when we're changing to a new major
>>>>> version number. As you all know, QEMU has a lot of legacy options,
>>>>> which
>>>>> are likely rather confusing than helpful for the new users nowadays,
>>>>> e.g. things like the "-net channel" option (which is fortunately even
>>>>> hardly documented), but maybe also even the whole vlan/hub concept in
>>>>> the net code, or legacy parameters like "-usbdevice". If we switch to
>>>>> version 3.0, could we agree to remove at least some of them?
>>>> I think if we are going to deprecate and remove options we need
>>>> a clear transition plan for doing so, which means at least one
>>>> release where options are "still works, but warn that they
>>>> are going away with pointer to documentation or similar info
>>>> about their replacement syntax", before actually dropping them.
>>> Yes, that's certainly a good idea. But as Daniel suggested in his mail,
>>> I think we should also have the rule that the option should be marked as
>>> deprecated in multiple releases first - so that the users have a chance
>>> to speak up before something gets really removed (otherwise the option
>>> could be removed right on the first day after the initial release with
>>> the deprecation message, so there is no time for the user to notice this
>>> and complain). Not sure whether we need three releases, as Daniel
>>> suggested, though, but if that's common sense, that's fine for me, too.
>>>
>>> Anyway, I've now started a Wiki page where we could track the removal of
>>> deprecated interfaces:
>>>
>>>    http://wiki.qemu-project.org/Features/LegacyRemoval
>>>
>>> Feedback / updates / addition of other legacy interfaces is welcome!
>>>
>>>    Thomas
>>>
>> I think we may want to add mipsnet to the list too. It's kernel driver
>> was removed about 3 years ago.
> But that's still the default network of the "mipssim" machine ...
> is that machine considered as deprecated, too?
>
>   Thomas

I think so, according to [1], it was deprecated.

[1] https://www.linux-mips.org/wiki/MIPSsim

Thanks