Re: FOR REVIEW: New x86-64 vsyscall vgetcpu()

[Chase Venters <chase dot venters at clientec dot com>]

On Fri, 16 Jun 2006, Zoltan Menyhart wrote:

> Jes Sorensen wrote:
> >  Zoltan Menyhart wrote:
> >
> > > Just to make sure I understand it correctly...
> > > Assuming I have allocated per CPU data (numa control, etc.) pointed at 
> > > by:
> >
> >
> >  I think you misunderstood - vgetcpu is for userland usage, not within
> >  the kernel.
> >
> >  Cheers,
> >  Jes
> I did understand it as a user land stuff.
> This is why I want to map the current task structure into the user space.
> In user code, we could see the actual value of the 
> "current->thread_info.cpu".
> My "#define current ((struct task_struct *) 0x...)" is not the same as
> the kernel's one.

I think it's probably best to leave most of the stuff in task_struct 
private (ie, mapped in kernel only).

> Thanks,
>
> Zoltan

Thanks,
Chase