Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3

Ingo Molnar
2007-03-03T07:27:56Z

* Ingo Molnar <mingo@elte.hu> wrote:

> Note that the control bits do not just magically change during normal
> FPU use. It's a bit like sys_setsid()/iopl/etc., it makes little sense
> to change those per-thread anyway. This is a non-issue anyway - what is
> important is that the big bulk of 512 (or more) bytes of FPU state /are/
> callee-saved (both on 32-bit and on 64-bit), hence there's no need to
^---- caller-saved
> unlazy anything or to do expensive FPU state saves or other FPU juggling
> around threadlet (or even syslet) use.