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

[Ingo Molnar]

* Ingo Molnar <mingo@xxxxxxx> 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.

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