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SubjectRe: [patch 1/2] x86,fpu: split FPU state from task struct
On Sun, Feb 24, 2008 at 08:22:02AM +0100, Ingo Molnar wrote:
>
> * Suresh Siddha <suresh.b.siddha@intel.com> wrote:
>
> > Split the FPU save area from the task struct. This allows easy
> > migration of FPU context, and it's generally cleaner. It also allows
> > the following two optimizations:
> >
> > 1) only allocate when the application actually uses FPU, so in the
> > first lazy FPU trap. This could save memory for non-fpu using apps.
> > Next patch does this lazy allocation.
> >
> > 2) allocate the right size for the actual cpu rather than 512 bytes
> > always. Patches enabling xsave/xrstor support (coming shortly) will
> > take advantage of this.
>
> i like the concept. Please clean up the issues found by Christoph and
> please also base it against x86.git#testing [this is clear 2.6.26
> material and there are already some changes in this area]:
>
> http://people.redhat.com/mingo/x86.git/README

Sure. Will do that in a day.

thanks,
suresh


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