QEMU KVM Memory Hugepages won't get used

[MaDDeePee]

Hello

it looks like if my gaming VM with hugepages is configured right, because:

hugetlbfs on /mnt/hugepages type hugetlbfs (rw,relatime,gid=78,mode=1770,pagesize=2M)

... and right after VM start that mountpoint is getting subdirs: "/mnt/hugepages/libvirt/qemu" but thats it. no file here.

well, and "cat /proc/meminfo":

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HugePages_Total:   16384
HugePages_Free:    16384
HugePages_Rsvd:    16384
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:        33554432 kB

BUT HugePages_Free stays exactly like this. nothing is used.

My VM-XML:

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    <qemu:arg value="memory-backend-file,id=mem1,size=32G,mem-path=/mnt/hugepages,share=on"/>

VM fires up without problems. VM is having 32GB rams and i wanted that all to be "covered" by hugepages.
Its just that i am unter the impression hugepages *are_not* used just because HugePages_Free doesnt shrink.
Am i wrong? Help