Re: [DISCUSSION] x86: In-Kernel Use of Extended General-Purpose Registers

[Chang S. Bae]

On 11/26/2025 8:30 AM, Peter Zijlstra wrote:
> IIRC it isn't hard to make kernel_fpu_begin/end() preemptible. It came
> up with the last xsave rework -- mostly in the context of -rt, but
> nobody ever picked it up and did it.

Thanks for looking at this! Looks like I couldn't spot on that exact 
thread though, I suppose another XSAVE buffer to do so. In any case, I'd 
bring up this option in a slide deck, as something worth revisiting.

Thanks,
Chang