ixgbe(4) spin lock held too long

[Sean Bruno]

On Mon, 2014-09-08 at 15:34 -0400, Eric van Gyzen wrote:
> >> Unread portion of the kernel message buffer:
> >> spin lock 0xffffffff812a0400 (callout) held by 0xfffff800151fe000
> (tid
> >> 100003) too long
> 
> TID 100003 is usually a kernel idle thread, which would seem to
> indicate
> a dangling lock.  Can you enable WITNESS (without WITNESS_SKIPSPIN) on
> this box? 

Will do.  I'll report back when we get a crash with WITNESS

sean