mbuf_jumbo_9k & iSCSI failing

[Matt Joras]

On Mon, Jun 26, 2017 at 6:36 AM, Andrey V. Elsukov <bu7cher at yandex.ru> wrote:
> On 26.06.2017 16:29, Ben RUBSON wrote:
>>
>>> On 26 Jun 2017, at 15:25, Andrey V. Elsukov <bu7cher at yandex.ru> wrote:
>>>
>>> On 26.06.2017 16:27, Ben RUBSON wrote:
>>>>
>>>>> On 26 Jun 2017, at 15:13, Andrey V. Elsukov <bu7cher at yandex.ru> wrote:
>>>>>
>>>>> I think it is not mlxen specific problem, we have the same symptoms with
>>>>> ixgbe(4) driver too. To avoid the problem we have patches that are
>>>>> disable using of 9k mbufs, and instead only use 4k mbufs.
>>>>
>>>> Interesting feedback Andrey, thank you !
>>>> The problem may be then "general".
>>>> So you still use large MTU (>=9000) but only allocating 4k mbufs, as a workaround ?
>>>
>>> Yes.
>>
>> Is it a kernel patch or a driver/ixgbe patch ?
>
> I attached it.
>
> --
> WBR, Andrey V. Elsukov

I didn't think that ixgbe(4) still suffered from this problem, and we
use it in the same situations rstone mentioned above. Indeed, ixgbe(4)
doesn't presently suffer from this problem (you can see that in your
patch, as it is only effectively changing the other drivers), though
it used to. It looks like it was first fixed to not to in r280182.