On 02/01/2014 11:46 AM, Linus Torvalds wrote:
>
> .. which *does* actually bring up something that might work, and might
> be a good idea: remove the "restore math state or set TS" from the
> normal kernel paths *entirely*, and move it to the "return to user
> space" phase.
>
The task switch code would have to be aware in case of preemption,
though. The nice thing about *that* is that we could probably
completely drop the notion that we can't preempt an FPU-using kernel task.
-hpa
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