can't start hvm with network

[Kevin Wang <kjw@xxxxxxxxxxxx>]

From: Kevin Wang <kjw@xxxxxxxxxxxx>
>From a previous thread (which I haven't had a chance to try on that other
256GB ram machine), It was suggested that "big ram" vms may have trouble
starting or start slowly, so I added:
echo 'GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=min:4096M,max:4096
M"' >>/etc/default/grub
grub-install /dev/sda

dur, update-grub. and now dom0 shows only 4G ram.

however, it still takes ~75 seconds at boot before ram is allocated to this "small" 12GB vm, and is then allowed to start running (note 'couch' cpu time still says 0.0)

# xl list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  4096     4     r-----      74.9
couch                                        1 12288     2     --p---       0.0

(The machine has 32GB physical RAM, so the kernel argument does work.)

   - Kevin