Panic on -CURRENT after LDT changes

[Attilio Rao]

2007/5/24, Joe Marcus Clarke <marcus at marcuscom.com>:
> On Thu, 2007-05-24 at 20:13 +0200, Attilio Rao wrote:
> > Jeff Roberson wrote:
> > > Thanks,  Attilio and I will look at this right away.
> > >
> > > Jeff
> > >
> > > On Wed, 23 May 2007, Joe Marcus Clarke wrote:
> > >
> > >> On a -CURRENT build today with Jeff's LDT locking changes, I get an
> > >> instant, reproducible panic by doing:
> > >>
> > >> # cd /usr/src
> > >> # make -DNO_CLEAN buildworld
> > >>
> > >> Backing out the LDT changes to /sys/i386/i386/*machdep* corrects the
> > >> problem.  Here is a dmesg and backtrace.  In frame 6, it appears mdp is
> > >> NULL (i.e. td->td_proc->p_md = 0x0).
> >
> > Did you enable WITNESS/INVARIANTS/INVARIANT_SUPPORT?
>
> No, this kernel does not have WITNESS or INVARIANTS.  I can enable those
> tomorrow if that would give you more useful information.

It would be very appreciated, since I've been unable to reproduce your
panic on a centrino dual core.

Thanks,
Attilio


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