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SubjectRe: ABI change for device drivers using future AVX instruction set
Andi Kleen wrote:
>>>> We could change kernel_fpu_begin() not to disable
>>>> preemption, but instead set a task flag. When we get the "no device"
>>>> fault, if the flag is set, save the fpu state into the kernel fpu save
>>>> area
>>>>
>>> What kernel fpu save area do you mean?
>>>
>>>
>> A new one, of course.
>>
>>
>
> With that we would be eventually in the mess Agner talked about.
>
>

If you use xsave, I don't see how this is different to the user fpu save
area.

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



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