Interesting Boot failure on HEAD with a large number of IGB nics

Garrett Cooper yaneurabeya at
Wed Jul 22 17:54:13 UTC 2015

> On Jul 22, 2015, at 10:14, Gary Palmer <gpalmer at> wrote:


> I'm no expert, but you may want to try setting
> hw.igb.num_queues=1
> and maybe
> hw.ixgbe.num_queues=1
> in the boot loader and trying that.

There was another discussion that took place around June on current that might be helpful. I think the solution boiled down to what Gary described above, because the driver auto tuning was broken...

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