Re: [PATCH] Add I/O hypercalls for i386 paravirt

Avi Kivity
2007-08-22T12:09:08Z

Andi Kleen wrote:
> On Wed, Aug 22, 2007 at 01:23:43PM +0300, Avi Kivity wrote:
>
>> Andi Kleen wrote:
>>
>>>> I don't see why it's intrusive -- they all use the APIs, right?
>>>>
>>>>
>>> Yes, but it still changes them. It might have a larger impact
>>> on code size for example.
>>>
>>>
>> Only if CONFIG_PARAVIRT is defined.
>>
>
> Which eventually distribution kernels will do.
>
>
>> And even then, all the performance
>> sensitive stuff uses mmio, no?
>>
>
> Not worried about performance, but just impact on code size etc.
>

Ah. But that's mostly modules, so real in-core changes should be very
small (say 10 bytes per call site X 10 callsites per driver X 10
drivers... even if off by an order of magnitude it's still tiny)

--
error compiling committee.c: too many arguments to function