@@ -436,7 +436,6 @@ func (d *Driver) setupMounts(container *configs.Config, c *execdriver.Command) e

 				flags = syscall.MS_NOEXEC | syscall.MS_NOSUID | syscall.MS_NODEV

 				err   error

 			)

-			fulldest := filepath.Join(c.Rootfs, m.Destination)

 			if m.Data != "" {

 				flags, data, err = mount.ParseTmpfsOptions(m.Data)

 				if err != nil {

@@ -449,8 +448,6 @@ func (d *Driver) setupMounts(container *configs.Config, c *execdriver.Command) e

 				Data:             data,

 				Device:           "tmpfs",

 				Flags:            flags,

-				PremountCmds:     genTmpfsPremountCmd(c.TmpDir, fulldest, m.Destination),

-				PostmountCmds:    genTmpfsPostmountCmd(c.TmpDir, fulldest, m.Destination),

 				PropagationFlags: []int{mountPropagationMap[volume.DefaultPropagationMode]},

 			})

 			continue

deleted file mode 100644

@@ -1,56 +0,0 @@

-package native

-

-import (

-	"fmt"

-	"os"

-	"os/exec"

-	"strings"

-

-	"github.com/Sirupsen/logrus"

-	"github.com/opencontainers/runc/libcontainer/configs"

-)

-

-func genTmpfsPremountCmd(tmpDir string, fullDest string, dest string) []configs.Command {

-	var premount []configs.Command

-	tarPath, err := exec.LookPath("tar")

-	if err != nil {

-		logrus.Warn("tar command is not available for tmpfs mount: %s", err)

-		return premount

-	}

-	if _, err = exec.LookPath("rm"); err != nil {

-		logrus.Warn("rm command is not available for tmpfs mount: %s", err)

-		return premount

-	}

-	tarFile := fmt.Sprintf("%s/%s.tar", tmpDir, strings.Replace(dest, "/", "_", -1))

-	if _, err := os.Stat(fullDest); err == nil {

-		premount = append(premount, configs.Command{

-			Path: tarPath,

-			Args: []string{"-cf", tarFile, "-C", fullDest, "."},

-		})

-	}

-	return premount

-}

-

-func genTmpfsPostmountCmd(tmpDir string, fullDest string, dest string) []configs.Command {

-	var postmount []configs.Command

-	tarPath, err := exec.LookPath("tar")

-	if err != nil {

-		return postmount

-	}

-	rmPath, err := exec.LookPath("rm")

-	if err != nil {

-		return postmount

-	}

-	if _, err := os.Stat(fullDest); os.IsNotExist(err) {

-		return postmount

-	}

-	tarFile := fmt.Sprintf("%s/%s.tar", tmpDir, strings.Replace(dest, "/", "_", -1))

-	postmount = append(postmount, configs.Command{

-		Path: tarPath,

-		Args: []string{"-xf", tarFile, "-C", fullDest, "."},

-	})

-	return append(postmount, configs.Command{

-		Path: rmPath,

-		Args: []string{"-f", tarFile},

-	})

-}

@@ -319,10 +319,7 @@ unit, `b` is used. Set LIMIT to `-1` to enable unlimited swap.

    $ docker run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image

-   This command mounts a `tmpfs` at `/tmp` within the container. The mount copies

-the underlying content of `my_image` into `/tmp`. For example if there was a

-directory `/tmp/content` in the base image, docker will copy this directory and

-all of its content on top of the tmpfs mounted on `/tmp`.  The supported mount

+   This command mounts a `tmpfs` at `/tmp` within the container.  The supported mount

 options are the same as the Linux default `mount` flags. If you do not specify

 any options, the systems uses the following options:

 `rw,noexec,nosuid,nodev,size=65536k`.

@@ -490,10 +490,7 @@ standard input.

    $ docker run -d --tmpfs /tmp:rw,size=787448k,mode=1777 my_image

-   This command mounts a `tmpfs` at `/tmp` within the container. The mount copies

-the underlying content of `my_image` into `/tmp`. For example if there was a

-directory `/tmp/content` in the base image, docker will copy this directory and

-all of its content on top of the tmpfs mounted on `/tmp`.  The supported mount

+   This command mounts a `tmpfs` at `/tmp` within the container.  The supported mount

 options are the same as the Linux default `mount` flags. If you do not specify

 any options, the systems uses the following options:

 `rw,noexec,nosuid,nodev,size=65536k`.