re0: watchdog timeout

[Yonghyeon PYUN]

On Mon, Apr 07, 2014 at 08:09:04AM +0200, Frank Volf wrote:
> Yonghyeon PYUN schreef op 7-4-2014 3:22:
> >On Sun, Apr 06, 2014 at 07:37:08PM -0400, Rick Macklem wrote:
> >>Frank Volf wrote:
> >>>Hello,
> >>>
> >>>I'm experiencing watchdog timeouts with my Realtek interface card.
> >>>
> >>>I'm using a fairly new system (Shuttle DS47), running FreeBSD
> >>>10-STABLE.
> >>>For this shuttle a patch has been recently committed to SVN to make
> >>>this
> >>>card work at all (revision *262391*
> >>><http://svnweb.freebsd.org/base?view=revision&revision=262391>).
> >>>
> >>>The timeout is only experienced under heavy network load (the system
> >>>is
> >>>running a bacula backup server that backups to NFS connected
> >>>storage),
> >>>and typically large full backups trigger this. Normal traffic works
> >>>fine
> >>>(this system is e.g. also my firewall to the Internet).
> >>>
> >>Since you mention NFS, you could try disabling TSO on the interface
> >>and see if that helps. (I'm beginning to feel like a parrot saying this,
> >>but...) If you care about why it might help, read this email thread:
> >>   http://docs.FreeBSD.org/cgi/mid.cgi?1850411724.1687820.1395621539316.JavaMail.root
> >>
> >>If it happens to help, please email again, since there are probably
> >>better ways to fix the problem than disabling TSO.
> >>
> >re(4) controllers support TSO but it was disabled long time
> >ago(r217832).
> >It's still allowed to enable TSO but users have to explicitly
> >enable it with ifconfig.  If Frank didn't explicitly enable TSO on
> >the box, TSO may have nothing to do with watchdog timeout, I guess.
> 
> I haven't explicitly enabled TSO, the only option that has been 
> explicitly set is -vlanhwtag, here is the interface config:
> 
> re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> options=8208b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE>
>         ether 80:ee:73:77:e9:ab
>         nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
>         media: Ethernet autoselect (1000baseT <full-duplex>)
>         status: active
> 

It would be even better to know your network configuration.  I'm
not sure why you have to disable VLAN hardware tagging.  But given
that you've disabled it, could you also try disabling VLAN hardware
checksum offloading?

> 
> Regards,
> 
> Frank
>