phsm commented on code in PR #10221:
URL: https://github.com/apache/cloudstack/pull/10221#discussion_r1926741646
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plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java:
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@@ -2796,8 +2800,18 @@ public int calculateCpuShares(VirtualMachineTO vmTO) {
if (hostCpuMaxCapacity > 0) {
Review Comment:
You are correct: the Cloudstack agent determines that the system uses cgroup
v2 correctly.
However, the older libvirt applies the cgroupv1 range as the restriction
regardless to which cgroup version it uses.
For example, the libvirt code of version 8.0.0 which is used in Ubuntu
22.04:
https://github.com/libvirt/libvirt/blob/v8.0.0/src/conf/domain_validate.c#L1536-L1538
. As you see there, the function just checks the value to be within range,
without consideration which cgroup version is in action.
So technically this PR does not fix a bug in Cloudstack - it adjust
Cloudstack to be compatible with the buggy behavior of older Libvirt.
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