sorry, it’s been a tough day, we had a major meltdown, caused by a faulty gbic
:-(
anyways, could you tell me what to do?
comment out, fix the off by one?
the machine is not yet production.
thanks,
danny
> On 18 Aug 2015, at 16:32, Hans Petter Selasky <h...@selasky.org> wrote:
>
> On 08/18/15 14:53, Rick Macklem wrote:
>> 2572 ifp->if_hw_tsomax = 65518;
>>> >2573 ifp->if_hw_tsomaxsegcount =
>>> >IXGBE_82599_SCATTER;
>>> >2574 ifp->if_hw_tsomaxsegsize = 2048;
>
> Hi,
>
> If IXGBE_82599_SCATTER is the maximum scatter/gather entries the hardware can
> do, remember to subtract one fragment for the TCP/IP-header mbuf!
>
> I think there is an off-by-one here:
>
> ifp->if_hw_tsomax = 65518;
> ifp->if_hw_tsomaxsegcount = IXGBE_82599_SCATTER - 1;
> ifp->if_hw_tsomaxsegsize = 2048;
>
> Refer to:
>
>> *
>> * NOTE: The TSO limits only apply to the data payload part of
>> * a TCP/IP packet. That means there is no need to subtract
>> * space for ethernet-, vlan-, IP- or TCP- headers from the
>> * TSO limits unless the hardware driver in question requires
>> * so.
>
> In sys/net/if_var.h
>
> Thank you!
>
> --HPS
>
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