func (m swapConfigurationHelper) configureSwap(ctx context.Context, lcr *runtimeapi.LinuxContainerResources, swapMemory int64) {
	logger := klog.FromContext(ctx)
	if !isCgroup2UnifiedMode() {
		logger.Error(fmt.Errorf("swap configuration is not supported with cgroup v1"), "Swap configuration under cgroup v1 is unexpected")
		return
	}

	if lcr.Unified == nil {
		lcr.Unified = map[string]string{}
	}

	lcr.Unified[cm.Cgroup2MaxSwapFilename] = fmt.Sprintf("%d", swapMemory)
}

// The swap limit is calculated as (<containerMemoryRequest>/<nodeTotalMemory>)*<totalPodsSwapAvailable>.
// For more info, please look at the following KEP: https://kep.k8s.io/2400
func calcSwapForBurstablePods(containerMemoryRequest, nodeTotalMemory, totalPodsSwapAvailable int64) (int64, error) {
	if nodeTotalMemory <= 0 {
		return 0, fmt.Errorf("total node memory is 0")
	}
	if containerMemoryRequest > nodeTotalMemory {
		return 0, fmt.Errorf("container request %d is larger than total node memory %d", containerMemoryRequest, nodeTotalMemory)
	}

	containerMemoryProportion := float64(containerMemoryRequest) / float64(nodeTotalMemory)
	swapAllocation := containerMemoryProportion * float64(totalPodsSwapAvailable)

	return int64(swapAllocation), nil
}

Warm-up