Chris is right ** Changed in: nova Status: In Progress => Invalid
-- 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/1637454 Title: 'require' CPU thread allocation policy does not always guarantee that other VMs wouldn't use current CPU core Status in OpenStack Compute (nova): Invalid Bug description: Environment: NUMA node with 2 CPU cores and HyperThreading. It means that we have 4 vCPU: (0, 1) (2, 3) where '()' means siblings. In this case we can boot only 2 VMs with 'require' CPU thread allocation policy because this policy is guarantee that other VMs wouldn't use these cores. If we will try to boot third VM with 'require' policy it will fail with 'No valid host found'. But we still able to boot VMs with 'dedicated' CPU allocation policy on these cores. Steps to reproduce: 1. Create Flavor with 'require' policy nova flavor-create numa_required 998 128 0 1 nova flavor-key numa_required set hw:cpu_policy=dedicated nova flavor-key numa_required set hw:cpu_thread_policy=require 2. Create Flavor just with 'dedicated' policy. hw:cpu_thread_policy is this case will be 'prefered' because this is default value. nova flavor-create numa_dedicated 999 128 0 1 nova flavor-key numa_dedicated set hw:cpu_policy=dedicated 3. Boot two VMs with 'require' policy nova boot nova boot --flavor numa_required --image cirros --nic net-id=*** vm1 nova boot nova boot --flavor numa_required --image cirros --nic net-id=*** vm2 4. Boot VM with 'decicated' policy nova boot nova boot --flavor numa_dedicated --image cirros --nic net- id=*** vm3 Expected result: Fail with 'No valid host found'. Actual result: VM will be successfully booted. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1637454/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp