ixgbe(4) and "Could not setup receive structures"

[K. Macy]

How many 9k jumbo clusters are available?

On Thu, Apr 14, 2011 at 3:05 PM, Leon Meßner
<l.messner at physik.tu-berlin.de> wrote:
> Hi,
>
> i tried setting the mtu on one of my ixgbe(4) intel NICs to support
> jumbo frames. This is on a box with RELENG_8 from today.
>
> # ifconfig ix0 mtu 9198
>
> I then get the following error:
>
> # tail -n 1 /var/log/messages
> Apr 14 12:48:43 siloneu kernel: ix0: Could not setup receive structures
>
> I already tried the following patch because of Jack Vogel's advice given
> in the following thread on -stable in Oct. last year, which still
> produces the same error message and leaves the box unpingable:
>
> http://lists.freebsd.org/pipermail/freebsd-stable/2010-October/059541.html
>
> # cat ~/patches/ixgbe.num_queues_to_4.patch
> --- /root/.vimbackup/ixgbe.c~   2011-04-12 22:14:27.000000000 +0000
> +++ sys/dev/ixgbe/ixgbe.c       2011-04-12 22:14:27.000000000 +0000
> @@ -273,7 +273,7 @@ TUNABLE_INT("hw.ixgbe.hdr_split", &ixgbe
>  * number of cpus. Each queue is a pair
>    * of RX and TX rings with a msix vector
>      */
>      -static int ixgbe_num_queues = 0;
>      +static int ixgbe_num_queues = 4;
>       TUNABLE_INT("hw.ixgbe.num_queues", &ixgbe_num_queues);
>
>         /*
>
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