igb "requests for mbufs denied"

[Mike Tancsa]

On 8/28/2014 4:31 AM, Eggert, Lars wrote:
> Hi,
>
> no matter what value I bump kern.ipc.nmbclusters and kern.ipc.nmbufs to, I still get "requests for mbufs denied" with igb interfaces, and the occasional connection stall, even when dialing down hw.igb.num_queues=1:
> The box in question has six igb interfaces, 2x 'I210 Gigabit Network Connection' and 4x '82580 Gigabit Network Connection' and is running:
>
> FreeBSD laurel.muccbc.hq.netapp.com 10.0-RELEASE-p7 FreeBSD 10.0-RELEASE-p7 #0: Tue Jul  8 06:37:44 UTC 2014     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
>
> Anyone have any ideas what else to try?

A stab in the dark, but I ran into a bug where setting queues to 1 did 
not have the same positive impact as disabling msix in loader.conf

hw.igb.enable_msix=0

	---Mike




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Mike Tancsa, tel +1 519 651 3400
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