weizhouapache commented on code in PR #10221:
URL: https://github.com/apache/cloudstack/pull/10221#discussion_r1926632745
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plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java:
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@@ -2796,8 +2796,16 @@ public int calculateCpuShares(VirtualMachineTO vmTO) {
if (hostCpuMaxCapacity > 0) {
int updatedCpuShares = (int) Math.ceil((requestedCpuShares *
CGROUP_V2_UPPER_LIMIT) / (double) hostCpuMaxCapacity);
- LOGGER.debug(String.format("This host utilizes cgroupv2 (as the
max shares value is [%s]), thus, the VM requested shares of [%s] will be
converted to " +
- "consider the host limits; the new CPU shares value is
[%s].", hostCpuMaxCapacity, requestedCpuShares, updatedCpuShares));
+
+ /**
+ * Libvirt < 9.1.0 enforces the range [2, 262144] to both cgroupv1
and cgroupv2.
+ * Therefore, if the shares value is determined to be < 2, then
raise it to 2 to fit into the constraint.
+ * See:
https://github.com/libvirt/libvirt/commit/38af6497610075e5fe386734b87186731d4c17ac
+ */
+ if (updatedCpuShares < 2) updatedCpuShares = 2;
Review Comment:
@phsm
can you define a constant ?
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