Server with 3TB Crashing at boot

[Steven Hartland]

On 14/03/2015 11:57, Konstantin Belousov wrote:
> On Sat, Mar 14, 2015 at 11:43:49AM +0000, Steven Hartland wrote:
>> Thats failing in bus_dmamem_alloc so as a guess I'd say there's no space
>> below the 4GB boundary for the allocation of size qsize.
> If this is indeed the case, laoder tunable hw.dmar.enable=1 could help.
> I assume that machine of this class does have VT-d hardware, you might
> need to enable it in BIOS.
I don't see that sysctl on my 10.1 boxes, is that something only in 
stable / current?