MSIX failure

[Jack Vogel]

On Thu, Sep 9, 2010 at 11:37 AM, John Baldwin <jhb at freebsd.org> wrote:

> On Thursday, September 09, 2010 12:41:07 pm Jack Vogel wrote:
> > On Thu, Sep 9, 2010 at 7:33 AM, Kurt Jaeger <pi at opsec.eu> wrote:
> >
> > > Hi!
> > >
> > > > > Is this within a jail or something else along those lines?  I can't
> > > > > reproduce the problem otherwise.  Frustrating!  Someone else on the
> > > list
> > > > > might have ideas as to what could cause this.
> > > >
> > > > Nope, this's a normal host. I've got securelevel on 1, but doubt that
> > > > would affect this?
> > >
> > > I assume it affects it.
> > >
> > > http://www.freebsd.org/doc/en/books/faq/security.html#SECURELEVEL
> > >
> > > Basically, when the securelevel is positive, the kernel restricts
> > > certain tasks; not even the superuser (i.e., root) is allowed to
> > > do them.
> > >
> > > There:
> > >
> > > # Write to kernel memory via /dev/mem and /dev/kmem.
> > >
> > > So I assume it also restricts reading /dev/kmem ?
> > >
> > >
> > OH YUCK, another root isn't really root, so is it also possibly
> > the reason for the MSIX failure?? Is this pile, er feature, on by
> default?
>
> securelevel does not affect any of the MSI/MSI-X bits.
>

Well then there's something else funny going on with that hardware, as at
least MSI should work with the chipset, I am not able to get that exact
skew from what I am told.

Jack