Re: [Qemu-devel] [PATCH v7 00/10] Convert msix_init() to error

[Paolo Bonzini <pbonzini@redhat.com>]

On 10/01/2017 15:38, Michael S. Tsirkin wrote:
> On Tue, Jan 10, 2017 at 11:06:08AM +0100, Markus Armbruster wrote:
>> "Michael S. Tsirkin" <mst@redhat.com> writes:
>>
>>> On Mon, Nov 14, 2016 at 03:25:30PM +0800, Cao jin wrote:
>>>> v7 changelog:
>>>> 1. fix the segfaut bug in patch 2. So drop the all the R-b of it,
>>>>    please take a look, there is detailed description in the patch.
>>>> 2. add the R-b from Hannes Reinecke
>>>>
>>>> Test:
>>>> 1. make check: pass
>>>> 2. After applied all the patch, command line test for all the
>>>>    affected devices, just make sure device realize process is ok,
>>>>    no crash, but no further use of device.
>>>
>>> Consider the megasas device for example, don't you
>>> need to test that the change actually does what
>>> it's intended to do?
>>
>> For better or worse, that's a higher bar than we commonly require for
>> refactorings.
>>
>> [...]
> 
> Well the patch says that it's addressing a TODO. If no one can
> be bothered to test the functionality, maybe we shouldn't bother
> with the change.
> 
> Generally this patchset is at v7.  It brings a very limited benefit to
> the project.  It better be perfect otherwise I don't see why bother.

I agree.  The changes to the device model are non-trivial and you should
make a decent effort at coverage of non-trivial changes.

Paolo