em interrupt storm

[Darren Pilgrim]

From: Scott Long [mailto:scottl at samsco.org] 
> Darren Pilgrim wrote:
> >
> > Until this gets "fixed" in FreeBSD, what should those of us who are
> > effectively stuck with this hardware do to avoid the problem?
> 
> What I've done is vacated the use of irq16 on my machines by disabling
> things like usb and if_em.

Do the devices have to be really turned off (meaning disabled in the BIOS)
or do I just not load the corresponding driver?

If nothing is using irq16, does the aliasing not occur or does it just
become transparent to FreeBSD?