Add the memory swappiness tuning option to docker.

Memory swappiness option takes 0-100, and helps to tune swappiness
behavior per container.
For example, When a lower value of swappiness is chosen
the container will see minimum major faults. When no value is
specified for memory-swappiness in docker UI, it is inherited from
parent cgroup. (generally 60 unless it is changed).

Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>

man/docker-create.1.md

@@ -48,6 +48,7 @@ docker-create - Create a new container
 [**--read-only**[=*false*]]
 [**--restart**[=*RESTART*]]
 [**--security-opt**[=*[]*]]
+[**--memory-swappiness**[=*MEMORY-SWAPPINESS*]]
 [**-t**|**--tty**[=*false*]]
 [**-u**|**--user**[=*USER*]]
 [**-v**|**--volume**[=*[]*]]
@@ -225,6 +226,9 @@ This value should always larger than **-m**, so you should always use this with
 **--security-opt**=[]
    Security Options
 
+**--memory-swappiness**=""
+   Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
+
 **-t**, **--tty**=*true*|*false*
    Allocate a pseudo-TTY. The default is *false*.
 

man/docker-run.1.md

@@ -51,6 +51,7 @@ docker-run - Run a command in a new container
 [**--rm**[=*false*]]
 [**--security-opt**[=*[]*]]
 [**--sig-proxy**[=*true*]]
+[**--memory-swappiness**[=*MEMORY-SWAPPINESS*]]
 [**-t**|**--tty**[=*false*]]
 [**-u**|**--user**[=*USER*]]
 [**-v**|**--volume**[=*[]*]]
@@ -371,6 +372,9 @@ its root filesystem mounted as read only prohibiting any writes.
 **--sig-proxy**=*true*|*false*
    Proxy received signals to the process (non-TTY mode only). SIGCHLD, SIGSTOP, and SIGKILL are not proxied. The default is *true*.
 
+**--memory-swappiness**=""
+   Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
+
 **-t**, **--tty**=*true*|*false*
    Allocate a pseudo-TTY. The default is *false*.