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)

[Thomas Huth <thuth@redhat.com>]

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