Public bug reported: Setting mem_stats_period_seconds=0 in nova.conf should prevent the “Virtio memory balloon” driver from loading but it doesn't.
We are running Rocky installed with openstack-ansible. To reproduce the error: 1. In nova.conf set "mem_stats_period_seconds = 0" on controllers and hypervisors 2. Restart nova services on controllers and hypervisors 3. Build VM 4. Log into VM and type: lspci 5. lspci output will include "Red Hat, Inc. Virtio memory balloon" For more information please see mailing list thread: http://lists.openstack.org/pipermail/openstack- discuss/2020-February/012336.html The problem this causes is that the Virtio memory balloon driver is not able to address large amounts of RAM. We encountered the problem when we built VMs with 1.4T RAM. The VM cannot boot because the driver fails: "BUG: unable to handle kernel paging request at ffff988b19478000" root@us01odc-dev2-ctrl1:~# dpkg -l | grep nova ii nova-api 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - API frontend ii nova-common 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - common files ii nova-conductor 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - conductor service ii nova-novncproxy 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - NoVNC proxy ii nova-placement-api 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - placement API frontend ii nova-scheduler 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - virtual machine scheduler ii python-nova 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute Python 2 libraries ii python-novaclient 2:11.0.0-0ubuntu1~cloud0 all client library for OpenStack Compute API - Python 2.7 root@us01odc-dev2-hv002:~# virsh --version 4.0.0 root@us01odc-dev2-hv002:~# qemu-system-x86_64 --version QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.21) root@us01odc-dev2-hv002:~# nova --version 11.0.0 root@us01odc-dev2-hv002:~# openstack --version openstack 3.16.1 ** Affects: nova Importance: Undecided Status: New -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1862425 Title: Setting mem_stats_period_seconds=0 should prevent the “Virtio memory balloon” driver from loading Status in OpenStack Compute (nova): New Bug description: Setting mem_stats_period_seconds=0 in nova.conf should prevent the “Virtio memory balloon” driver from loading but it doesn't. We are running Rocky installed with openstack-ansible. To reproduce the error: 1. In nova.conf set "mem_stats_period_seconds = 0" on controllers and hypervisors 2. Restart nova services on controllers and hypervisors 3. Build VM 4. Log into VM and type: lspci 5. lspci output will include "Red Hat, Inc. Virtio memory balloon" For more information please see mailing list thread: http://lists.openstack.org/pipermail/openstack- discuss/2020-February/012336.html The problem this causes is that the Virtio memory balloon driver is not able to address large amounts of RAM. We encountered the problem when we built VMs with 1.4T RAM. The VM cannot boot because the driver fails: "BUG: unable to handle kernel paging request at ffff988b19478000" root@us01odc-dev2-ctrl1:~# dpkg -l | grep nova ii nova-api 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - API frontend ii nova-common 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - common files ii nova-conductor 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - conductor service ii nova-novncproxy 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - NoVNC proxy ii nova-placement-api 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - placement API frontend ii nova-scheduler 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute - virtual machine scheduler ii python-nova 2:18.2.3-0ubuntu1~cloud0 all OpenStack Compute Python 2 libraries ii python-novaclient 2:11.0.0-0ubuntu1~cloud0 all client library for OpenStack Compute API - Python 2.7 root@us01odc-dev2-hv002:~# virsh --version 4.0.0 root@us01odc-dev2-hv002:~# qemu-system-x86_64 --version QEMU emulator version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.21) root@us01odc-dev2-hv002:~# nova --version 11.0.0 root@us01odc-dev2-hv002:~# openstack --version openstack 3.16.1 To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1862425/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
