Re: [Qemu-devel] [patch 2/6] Use machine options to emulate -no-kvm-irqchip

[Jan Kiszka]

On 2012-10-04 17:36, Andreas Färber wrote:
> Am 04.10.2012 16:30, schrieb Jan Kiszka:
>> On 2012-10-04 16:21, Anthony Liguori wrote:
>>> -no-kvm should be included too.
>>
>> Reminds me that we still need to agree on the final default accel strategy.
>>
>>>
>>> I just ran across a user that was injecting '-no-kvm-irqchip' in their
>>> libvirt XML via a custom attribute.  It turned out it was to work around
>>> broken MSI support in their funky guest they were running.  It was the
>>> wrong solution to the problem but they were doing it regardless.
>>>
>>> The point is, there are users in the wild using these options.  There's
>>> no reason to remove them if they are trivial to maintain (and they are
>>> in their current form).
>>
>> So let's define a consistent policy for them all:
>>  - warn on the command line on use
> 
>>  - avoid adding them to the help or other user documentation
> 
> That's dangerous - at some point someone will notice and propose a patch
> documenting them and the reviewers may have forgotten by then why it was
> not documented in the first place. Better clearly document them in help
> output as "DEPRECATED, to be removed in future versions" or so.

-M is marked as deprecated in the file that you would have to mess up.

Jan

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