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SubjectRe: Switch APIC to driver model (and make S3 sleep with APIC on)
Hi!

> > Unfortunately my systems seems to miss bfd.h, required by libutil++.
>
> The debian package is apparently called binutils-dev

Thanx. oprofile now seems to work for me.

> > > I haven't seen where you added these checks. They did not exist before:
> > > oprofile took responsibility for the NMI/perfctr handling off the NMI
> > > watchdog entirely, then handed it back when oprofile finished.
> >
> > Ouch, I did not see that code. It seems not to be in nmi_int.c; where
> > is that?
>
> oprofile saves the perfctr config when it starts in nmi_int.c, then
> calls the set_nmi_pm_callback. Then the suspend/resume calls oprofile's,
> and we assume we have unique access to controlling the generated NMIs
> (ie it becomes oprofile's job to ensure no NMIs are generated by the
> perfctrs whilst suspended).

I can see set_nmi_pm_callback() in nmi_setup(), but can not see where
nmi.c's pm_callback is restored in nmi_shutdown(). Perhaps that's a
bug?

> It's pretty ugly, so a correct cleanup would be appreciated.
>
> I suppose this is quite an unusual case for the PM model ?

Yes, it is pretty unusual.
Pavel
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