Re: current pointer question/suggestion
Alexander Kjeldaas (astor@guardian.no)
Sun, 19 Jul 1998 18:03:49 +0200
On Sat, Jul 18, 1998 at 08:45:05PM -0400, Benjamin C.R. LaHaise wrote:
> On Sat, 18 Jul 1998, Alexander Kjeldaas wrote:
> >
> > #define __current_virt_addr 0x01234567
> > #define current ((struct *task_struct)%esp & ~8191)
> > #define __current ((struct *task_struct)__current_virt_addr)
>
> And this just plain ain't gonna work on SMP (think of clone'd processes
> that shared the same memory mapping). As for whether or not the effoer
> worth it on UP is questionable.
>
I see. I guess the page would have to be per-cpu instead of
per-process. And then it gets a bit hairy - I'm starting to have
doubts myself. Oh well.. :-)
astor
--
Alexander Kjeldaas, Guardian Networks AS, Trondheim, Norway
http://www.guardian.no/
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