[Bridge] Re: Problem in changed VLAN code can cause systems to hang.

[David S. Miller]

On Thu, 9 Sep 2004 08:33:58 -0700 (PDT)
shemminger at osdl.org wrote:

> > On Thu, 09 Sep 2004 15:16:33 +0200
> > Mark Ruijter <bridge at siennax.com> wrote:
> >
> >> I noticed that the VLAN code of kernels >=2.6.8 contain the patch needed
> >> to mirror link state information from the real device to the vlan
> >> device.
> >>
> >> This however causes the system to hang in combination with net-snmpd.
> >> The last thing that I see is an ioctl(0x8947...
> >
> > What kind of ethernet devices do you have making use of VLAN?
> 
> I suspect the underlying device doesn't support mii interface.
> If that is true, then the code is doing the right thing (and net-snmp)
> is being too dependant on MII.

It does, it's tg3.  And it shouldn't hang the machine, it's not just
hanging userspace.  Therefore it is a kernel bug.