Latest Jessie doesn't respond to /etc/default/tmpfs "RAMTMP=yes"

[Rick Thomas <rbthomas@pobox.com>]

I’m trying to get /tmp on tmpfs, so I put “RAMTMP=yes” in /dev/default/tmpfs .

But I don’t get /tmp/mounted on tmpfs.

I’ve got plenty of ram and swap:

> rbthomas@jessie:~$ cat /proc/meminfo | egrep '^(Mem|Swap)Total:'
> MemTotal:        1017648 kB
> SwapTotal:       2928636 kB

Here’s my /etc/default/tmpfs file:

> # Configuration for tmpfs filesystems mounted in early boot, before
> # filesystems from /etc/fstab are mounted.  For information about
> # these variables see the tmpfs(5) manual page.
> 
> # /run is always mounted as a tmpfs on systems which support tmpfs
> # mounts.
> 
> # mount /run/lock as a tmpfs (separately from /run).  Defaults to yes;
> # set to no to disable (/run/lock will then be part of the /run tmpfs,
> # if available).
> #RAMLOCK=yes
> 
> # mount /run/shm as a tmpfs (separately from /run).  Defaults to yes;
> # set to no to disable (/run/shm will then be part of the /run tmpfs,
> # if available).
> #RAMSHM=yes
> 
> # mount /tmp as a tmpfs.  Defaults to no; set to yes to enable (/tmp
> # will be part of the root filesystem if disabled).  /tmp may also be
> # configured to be a separate mount in /etc/fstab.
> RAMTMP=yes
> 
> # Size limits.  Please see tmpfs(5) for details on how to configure
> # tmpfs size limits.
> TMPFS_SIZE=50%VM
> #RUN_SIZE=10%
> #LOCK_SIZE=5242880 # 5MiB
> #SHM_SIZE=
> TMP_SIZE=20%VM
> 
> # Mount tmpfs on /tmp if there is less than the limit size (in kiB) on
> # the root filesystem (overriding RAMTMP).
> #TMP_OVERFLOW_LIMIT=1024

The same config works on Wheezy…

Rick