[ovirt-users] huge page in ovirt 4.2.7

[Fabrice Bacchella]

I'm trying to understand huge page in oVirt, I'm quite sure to understand it 
well.

I have an host with 128GiB. I have configured reserved huge page:

cat /proc/cmdline 

... hugepagesz=1GB hugepages=120

$ grep -r . /sys/kernel/mm/hugepages
/sys/kernel/mm/hugepages/hugepages-1048576kB/nr_overcommit_hugepages:0
/sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages:120
/sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages_mempolicy:120
/sys/kernel/mm/hugepages/hugepages-1048576kB/surplus_hugepages:0
/sys/kernel/mm/hugepages/hugepages-1048576kB/resv_hugepages:0
/sys/kernel/mm/hugepages/hugepages-1048576kB/free_hugepages:120
/sys/kernel/mm/hugepages/hugepages-2048kB/nr_overcommit_hugepages:0
/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages:0
/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages_mempolicy:0
/sys/kernel/mm/hugepages/hugepages-2048kB/surplus_hugepages:0
/sys/kernel/mm/hugepages/hugepages-2048kB/resv_hugepages:0
/sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages:0

I have a big VM running on it:
  <custom_properties>
    <custom_property>
      <name>hugepages</name>
      <value>64</value>
    </custom_property>
  </custom_properties>
  <memory>68719476736</memory>, aka 65536 MiB
  <memory_policy>
    <guaranteed>34359738368</guaranteed>, aka 32768 MiB
    <max>68719476736</max>
  </memory_policy>

And it keep failing when I want to start it:
/var/log/ovirt-engine/engine.log:2018-11-14 12:56:06,937+01 ERROR 
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default 
task-66) [13c13a2c-f973-4ba2-b8bd-260e5b35a047] EVENT_ID: 
USER_FAILED_RUN_VM(54), Failed to run VM XXX due to a failed validation: 
[Cannot run VM. There is no host that satisfies current scheduling constraints. 
See below for details:, The host XXX did not satisfy internal filter HugePages 
because there are not enough free huge pages to run the VM.]

The huge page fs is mounted:

$ findmnt
| |-/dev/hugepages1G                  hugetlbfs      hugetlbfs   
rw,relatime,pagesize=1G
| `-/dev/hugepages                    hugetlbfs      hugetlbfs   rw,relatime

What am I missing ?
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