Qemu and virsh. How to give a virtual machine more than 900MB?

Question

Virtualization

qemu (64bit). RAM=2G.
guest - x86 (i686). The kernel is not going to - Out of memory.

<memory unit='KiB'>1100000</memory>
<memballoon mode='none'/>

<memory unit='MiB'>1200</memory> тоже ничего.
guest>free
900048 26648 649860 ...
lspci balloon does not show.
host>free (after starting the guest)
1954980 420228 1393016 ... Gives
less than 900 to the guest. And no more. I can assume that the balloon (imposed service) works.

<qemu:commandline>
  <qemu:arg value='-balloon none'/>
</qemu:commandline>

doesn't help either.
1. Why does free display so much free memory, is it given to the guest?
2. How to give a guest more than 900?
after several attempts, she began to give the guest 89xxxxxx.