Re: [PATCH] Fast path context switch - microoptimize FPU reload

[Andi Kleen]

On Sun, Mar 09, 2003 at 06:15:09PM +0100, Manfred Spraul wrote:

> What about moving TIF_USEDFPU from the thread_info into 
> task_struct->flags? This flag word is only accessed by "current", no 
> special atomicity requirements.

There is still a PF_USEDFPU defined there that can be used.
I'll change it to using that.

But it would be a good idea to completely split the flags that are
changed externally like signals from only process local bits. 

Then we could avoid the wasteful LOCK prefixes for everything local.

-Andi