On 2/27/14, 11:08 PM, Peter Grehan wrote:
Hi Rudy,

I'm seeing something odd...  I am running this command:

  bhyve -c 4 -m 2048M -H -P -A -s 0:0,hostbridge -s 1:0,lpc -s
2,virtio-net,tap1 -s 3,virtio-blk,/dev/zvol/data/vm1 -l com1,/dev/nmdm1A
but I the VM is being lazy...

A number of people have reported this, and looking at it, I think it's a bug in bhyve.

nmdm attempts to simulate modem control (not quite correctly - run back-back cu's to see some of the behaviour), but also bhyve doesn't open the device non-blocking. This results in the open() syscall waiting for simulated carrier-detect to arrive, which doesn't happen until the other end of the nmdm is opened.

I have a fix: echo into the nmdm after booting VM.

Added this line to bhyve.rc

echo >> ${bhyve_nmdmBdev}

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