* cAdvisor: Fix NVML initialization race condition ([#68431](https://github.com/kubernetes/kubernetes/pull/68431), [@dashpole](https://github.com/dashpole))
    * cAdvisor: Fix brtfs filesystem discovery
    * cAdvisor: Fix race condition with AllDockerContainers
    * cAdvisor: Don't watch .mount cgroups
    * cAdvisor: Reduce lock contention during list containers

package cmd

import (
	"syscall"
)

// Returns true if no error and there is no object or prefix inside this directory
func isDirEmpty(dirname string, legacy bool) bool {
	if legacy {
		// On filesystems such as btrfs, nfs this is not true, so fallback
		// to performing readdir() instead.
		entries, err := readDirN(dirname, 1)
		if err != nil {
			return false
		}
		return len(entries) == 0
	}
	var stat syscall.Stat_t

* Fix disk partition discovery for brtfs ([#46816](https://github.com/kubernetes/kubernetes/pull/46816), [@dashpole](https://github.com/dashpole))
    * Add ZFS support
    * Add overlay2 storage driver support

MinIO follows strict **read-after-write** and **list-after-write** consistency model for all i/o operations both in distributed and standalone modes. This consistency model is only guaranteed if you use disk filesystems such as xfs, zfs or btrfs etc.. for distributed setup.

**In our tests we also found ext4 does not honor POSIX O_DIRECT/Fdatasync semantics, ext4 trades performance for consistency guarantees. Please avoid ext4 in your setup.**

    * Don't watch .mount cgroups to reduce number of inotify watches
    * Fix NVML initialization race condition
    * Fix brtfs disk metrics when using a subdirectory of a subvolume
* Pass cluster_location argument to Heapster ([#65176](https://github.com/kubernetes/kubernetes/pull/65176), [@kawych](https://github.com/kawych))

    * Don't watch .mount cgroups to reduce number of inotify watches
    * Fix NVML initialization race condition
    * Fix brtfs disk metrics when using a subdirectory of a subvolume
* User can now use `sudo crictl` on GCE cluster. ([#65389](https://github.com/kubernetes/kubernetes/pull/65389), [@Random-Liu](https://github.com/Random-Liu))

* Fix disk partition discovery for brtfs ([#46816](https://github.com/kubernetes/kubernetes/pull/46816), [@dashpole](https://github.com/dashpole))
    * Add ZFS support
    * Add overlay2 storage driver support

    * Don't watch .mount cgroups to reduce number of inotify watches
    * Fix NVML initialization race condition
    * Fix brtfs disk metrics when using a subdirectory of a subvolume

- Persistent Volumes formatted with the btrfs filesystem will now automatically resize when expanded. ([#99361](https://github.com/kubernetes/kubernetes/pull/99361), [@Novex](https://github.com/Novex)) [SIG Storage]

- Added prune flag into `diff` command to simulate `apply --prune`. ([#105164](https://github.com/kubernetes/kubernetes/pull/105164), [@ardaguclu](https://github.com/ardaguclu))
- Added support for `btrfs` resizing ([#108561](https://github.com/kubernetes/kubernetes/pull/108561), [@RomanBednar](https://github.com/RomanBednar))