Ignacio García Pérez wrote:
> Hi,
>
> There must be something very obvious I'm missing, yet I don't know why
> and I'm stuck.
>
> I've got a very simple program that starts a simple periodic task that
> reads from port 0x281 at 2KHz. When the inb(0x281) is executed my
> program segfaults. If I comment that code, everything works fine (the
> periodic task executes as expected).
>
> In my initialization code, I've remembered to:
>
> iopl(3)
> mlockall(MCL_CURRENT | MCL_FUTURE)
> rt_misc_get_io_region
>
> Even tried to issue the iopl(3) again from the periodic task itself. No way.
>
> I'm using kernel 2.6.17.11 and Xenomai v2.2.2.
Do you check the return values of iopl and mlockall ?
--
Gilles Chanteperdrix.
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