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

[Mike Tancsa]

On 1/30/2016 12:26 PM, Marius Strobl wrote:
> 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?

Hi,
	Should the nic come up with TSO disabled by default ? After reboot, I see


# ifconfig em0
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 00:30:48:9c:59:f0

	---Mike


-- 
-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
Cambridge, Ontario Canada   http://www.tancsa.com/