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

Sat Jan 30 01:24:08 UTC 2016

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?

Marius