Re: ABI change for device drivers using future AVX instruction set

[Avi Kivity]

Andi Kleen wrote:

 

> > If you use xsave, I don't see how this is different to the user fpu save
> > area.
> >     
>
> For once there's no clear error handling path for allocation failures
> on the (arbitarily sized) xsave state. On user code that can be barely
> tolerated, but for the kernel it would be deadly.
>   

if (kernel_fpu_begin() < 0)
    goto no_sse;

The question is not if it can be done or not, it's whether making raid 
preemptible is worthwhile, and whether we see/want more sse/avx 
accelerated drivers or not.

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

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