possible em regression (was Re: svn commit: r294958 - in stable/10: share/man/man4 sys/dev/e1000 sys/dev/ixgb sys/dev/netmap)

[Marius Strobl]

On Sat, Jan 30, 2016 at 11:47:19AM -0500, Mike Tancsa wrote:
> On 1/29/2016 8:23 PM, Marius Strobl wrote:
> > On Fri, Jan 29, 2016 at 03:41:57PM -0500, Mike Tancsa wrote:
> >>
> >> No multi queue. Stock GENERIC kernel with a couple of things removed.
> >> hw.em are just the defaults. I will try without TSO
> >>
> >> % ifconfig em0
> >> em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
> >>
> >> options=4209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWTSO>
> >>
> > 
> > Hrm, that's strange, TSO4 should be enabled by default so apparently
> > you are already disabling it; what is the behavior if you turn it on?
> > Do you use a < Gigabit link?
> 
> Hi Marius,
> 	Thanks for looking. The ifconfig output was after I turned off tso as
> Harry suggested to try.  Its been 24hrs and I have not seen any resets.
>  I will wait another 36hrs or so and then turn it back on to see if the
> problem comes back.
> 
> this link is 100Mb.

Ah, okay, that at least makes sense. Can you please verify that with
the attached patch applied, you have a setup that works out of the
box?

Marius

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