Add support for quotas for ephemeral storage monitoring. (#14268)

content/en/docs/reference/command-line-tools-reference/feature-gates.md

@@ -106,6 +106,7 @@ different Kubernetes components.
 | `KubeletPodResources` | `false` | Alpha | 1.13 | |
 | `LocalStorageCapacityIsolation` | `false` | Alpha | 1.7 | 1.9 |
 | `LocalStorageCapacityIsolation` | `true` | Beta| 1.10 | |
+| `LocalStorageCapacityIsolationFSQuotaMonitoring` | `false` | Alpha| 1.15 | |
 | `MountContainers` | `false` | Alpha | 1.9 | |
 | `MountPropagation` | `false` | Alpha | 1.8 | 1.9 |
 | `MountPropagation` | `true` | Beta | 1.10 | 1.11 |
@@ -276,6 +277,7 @@ Each feature gate is designed for enabling/disabling a specific feature:
 - `KubeletPodResources`: Enable the kubelet's pod resources grpc endpoint.
    See [Support Device Monitoring](https://git.k8s.io/community/keps/sig-node/compute-device-assignment.md) for more details.
 - `LocalStorageCapacityIsolation`: Enable the consumption of [local ephemeral storage](/docs/concepts/configuration/manage-compute-resources-container/) and also the `sizeLimit` property of an [emptyDir volume](/docs/concepts/storage/volumes/#emptydir).
+- `LocalStorageCapacityIsolationFSQuotaMonitoring`: When `LocalStorageCapacityIsolation` is enabled for [local ephemeral storage](/docs/concepts/configuration/manage-compute-resources-container/) and the backing filesystem for [emptyDir volumes](/docs/concepts/storage/volumes/#emptydir) supports project quotas and they are enabled, use project quotas to monitor [emptyDir volume](/docs/concepts/storage/volumes/#emptydir) storage consumption rather than filesystem walk for better performance and accuracy.
 - `MountContainers`: Enable using utility containers on host as the volume mounter.
 - `MountPropagation`: Enable sharing volume mounted by one container to other containers or pods.
   For more details, please see [mount propagation](/docs/concepts/storage/volumes/#mount-propagation).