Re: CURRENT: re(4) crashing system

On Mon, 31 Oct 2016 11:12:22 +0900
YongHyeon PYUN <pyunyh_at_gmail.com> wrote:

> On Fri, Oct 28, 2016 at 09:21:13PM +0200, Hartmann, O. wrote:
> > On Thu, 27 Oct 2016 10:00:04 +0900
> > YongHyeon PYUN <pyunyh_at_gmail.com> wrote:
> >   
> > > On Tue, Oct 25, 2016 at 07:03:38AM +0200, Hartmann, O. wrote:  
> > > > On Tue, 25 Oct 2016 11:05:38 +0900
> > > > YongHyeon PYUN <pyunyh_at_gmail.com> wrote:
> > > >     
> > > 
> > > [...]
> > >   
> > > > > I'm not sure but it's likely the issue is related with
> > > > > EEE/Green Ethernet handling. EEE is negotiated feature with
> > > > > link partner. If you directly connect your laptop to non-EEE
> > > > > capable link partner like other re(4) box without switches
> > > > > you may be able to tell whether the issue is EEE/Green
> > > > > Ethernet related one or not.    
> > > > 
> > > > Me either since when I discovered a problem the first time with
> > > > CURRENT, that was the Friday before last week's Friday, there
> > > > was a unlucky coicidence: I got the new switch, FreeBSD
> > > > introduced a serious bug and I changed the NICs.
> > > > 
> > > > The laptop, the last in the row of re(4) equipted systems on
> > > > which I use the Realtek NIC, does well now with Green IT
> > > > technology, but crashes on plugging/unplugging - not on each
> > > > event, but at least in one of ten.    
> > > 
> > > Hmm, it seems you know how to trigger the issue. When you unplug
> > > UTP cable was there active network traffic on re(4) device?
> > > It would be helpful to know which event triggers the crash(e.g.
> > > unplugging or plugging).  And would you show me backtrace of
> > > panic? 
> > > > I guess the Green IT issue is more a unlucky guess of mine and
> > > > went hand in hand with the problem I face with CURRENT right
> > > > now on some older, Non UEFI machines.
> > > >     
> > > 
> > > Ok.
> > > 
> > > [...]  
> > > > 
> > > > As requested the informations about re0 and rgephy0 on the
> > > > laptop (Lenovo E540) 
> > > > 
> > > > [...]
> > > > 
> > > > rgephy0: <RTL8251 1000BASE-T media interface> PHY 1 on miibus0
> > > > rgephy0:  none, 10baseT, 10baseT-FDX, 10baseT-FDX-flow,
> > > > 100baseTX, 100baseTX-FDX, 100baseTX-FDX-flow, 1000baseT-FDX,
> > > > 1000baseT-FDX-master, 1000baseT-FDX-flow,
> > > > 1000baseT-FDX-flow-master, auto, auto-flow
> > > > 
> > > > re0: <RealTek 8168/8111 B/C/CP/D/DP/E/F/G PCIe Gigabit Ethernet>
> > > > port 0x3000-0x30ff mem
> > > > 0xf0d04000-0xf0d04fff,0xf0d00000-0xf0d03fff at device 0.0 on
> > > > pci2 re0: Using 1 MSI-X message re0: ASPM disabled re0: Chip
> > > > rev. 0x50800000 re0: MAC rev. 0x00100000    
> > > 
> > > This looks like 8168GU controller.
> > > 
> > > [...]
> > >   
> > > > I use options netmap in kernel config, but the problem is also
> > > > present without this option - just for the record.
> > > >     
> > > 
> > > Yup, netmap(4) has nothing to do with the crash.
> > > 
> > > Thanks.  
> > 
> > Attached, you'll find the backtrace of the crash. This time it was
> > really easy - just one pull of the LAN cabling - and we are
> > happy :-/
> > 
> > Please let me know if you need something else. I will return to
> > normal operations (disabling debugging) due to CURRENT is very
> > unstable at the moment on other hosts beyond r307157.
> >   
> 
> It seems the attachment was stripped.

This time I hope I got it right!

Attached you'll find the latest CURRENT's backtrace on the provoked
crash (plug and unplug).

I also saved the kernel and coredump, so if you need me to do further
investigations,please let me know.

Thanks in advance and kind regards,

oliver