Hi, I think you've hit similar issue as reported here:
https://bugzilla.redhat.com/show_bug.cgi?id=1812316 You're right, the hugepages are considered as allocated memory and it is a bug. I am working on a fix right now. Regards, Lucia On Wed, Apr 15, 2020 at 1:21 PM Alan G <alan+ov...@griff.me.uk> wrote: > Hi, > > I seem to have found an issue when trying to setup a high performance VM > utilising hugepages and NUMA pinning. > > The VM is configured for 32GB RAM and uses hugepages of size 1G. > > The host has two NUMA nodes each having 64GB RAM (for 128GB total system > RAM). > > No other VMs are running or otherwise pinned to the host. > > The VM is pinned to node 0. And the required hugepages are allocated with > > echo 32 > > /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages > > I then attempt to start the VM and get a pop-up error saying "cannot > accommodate memory of VM's pinned virtual NUMA nodes within host's physical > NUMA nodes". > > However, if I remove the hugepages from node 0 > > echo 0 > > /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages > > Start the VM and then immediately re-create the hugepqages then everything > works as expected. > > It seems to me that oVirt is considering the hugepages as allocated memory > even if they are not in use. > > Is this correct? > > Thanks, > > Alan > > _______________________________________________ > Users mailing list -- users@ovirt.org > To unsubscribe send an email to users-le...@ovirt.org > Privacy Statement: https://www.ovirt.org/privacy-policy.html > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/32QKZ2EQ5OKTMPJD4M6W7QK2FKFDFK2E/ >
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