BHyVe: vm_setup_memory(highmem): Cannot allocate memory

[Roman Bogorodskiy]

  Roman Bogorodskiy wrote:

> Hi,
> 
> I'm running into a problem. I did a fresh checkout of 'bhyve' branch
> from svn and followed the instruction here:
> 
> http://people.freebsd.org/~neel/bhyve/bhyve_instructions.txt
> 
> In my /boot/loader.conf I have:
> 
> debug.witness.watch="0"
> hw.physmem="0x180000000"
> 
> and dmesg says:
> 
> real memory  = 8589934592 (8192 MB)
> avail memory = 5643694080 (5382 MB)
> 
> When I try to start a VM I get this error:
> 
> (19:46) novel at kloomba:~/bhyve/vm1 %> sudo ./vmrun.sh -m 256 vm1
> Launching virtual machine "vm1" with 256MB memory below 4GB and 2048MB memory above 4GB ...
> vm_setup_memory(highmem): Cannot allocate memory
> (19:46) novel at kloomba:~/bhyve/vm1 %> 
> 
> This page:
> 
> http://callfortesting.org/bhyve/
> 
> describes that reloading 'vmm' would help, but doing it changes nothing.
> 
> Any ideas what's wrong with that? Also, I am curious, what do these
> numbers mean:
> 
> "256MB memory below 4GB and 2048MB memory above 4GB". I get that 256 is
> the amount of mem to give to VM, but what do 4GB and 2048MB stand for?

I have managed to boot a VM.

The 4GB thing is hardcoded in the vmrun.sh script:

110 echo "Launching virtual machine \"$vmname\" with ${lowmem}MB memory
below 4GB and ${highmem}MB memory above 4GB ..."

Also, it seems it's hardcoded in bhyveload.c:

        if (highmem != 0) {
                error = vm_setup_memory(ctx, 4 * GB, highmem, NULL); <--- here
                if (error) {
                        perror("vm_setup_memory(highmem)");
                        exit(1);
                }
        }

I used './vmrun.sh -m 512 -M 0 vm1' which sets highmem == 0 to avoid this call.

Roman Bogorodskiy
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