> I wrote:
> >> whereas I think the questioner wanted:
> >>
> >> tell_scheduler_that_i_do_not_really_matter ();
> >> while (!done_computing) {
> >> compute();
> >> }
> >>
>
> Vladimir responded:
>
> >i'd say that the second piece of code is just a userspace program.
> >Right ?
>
> Well, normally, yes, but if its tickling device registers and it
> doesn't run as root (no ioperm/iopl access), and for sure if it does
> DMA or accesses device memory, then no. Maybe I should have used more
> suitable name than "compute()" :)
Well yes, but what about writing an interface and then doing everything in
ioctl's ? I.e. the module part only does the requests (dma, accessing
registers) and the userspace part everything else.
Vladimir Dergachev
>
> --p
>
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