[Bug 200221] em0 watchdog timeout under load

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200221

--- Comment #21 from Julien Cigar <jcigar at ulb.ac.be> ---
Note that this is with TSO enabled:

em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
       
options=4219b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MAGIC,VLAN_HWTSO>
        ether 68:05:ca:xx:xx:xx
        inet 192.168.0.254 netmask 0xffffff00 broadcast 192.168.0.255 
        inet 192.168.0.21 netmask 0xffffffff broadcast 192.168.0.21 
        inet 192.168.0.20 netmask 0xffffffff broadcast 192.168.0.20 
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: Ethernet autoselect (1000baseT <full-duplex>)
        status: active

I'll try to disable TSO and see if it fixes the problem ..

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