I am running SLSE12 and the root partition is 95% used and I would like to increase this storage.
I noticed the filesystems devtmpfs, and three tmpfs are 943M and 949M respectively by minimally used. Are these logical filesystems within the / "root" filesystem? If this is so then can these be resized smaller? Would the / "root" automatically obtain this space or would it need to be resized larger?
Another way I was looking at this was to find the directories that were large and replace them with a LVM volume. I find /var with 285M but a bit confused with /bin at 5.0M. If I can replace /var then what would the process be to replace it?

df -kh
Filesystem Size Used Avail Use% Mounted on
/dev/dasda3 5.5G 5.0G 291M 95% /
devtmpfs 943M 0 943M 0% /dev
tmpfs 949M 80K 949M 1% /dev/shm
tmpfs 949M 9.4M 940M 1% /run
tmpfs 949M 0 949M 0% /sys/fs/cgroup
/dev/dasda1 194M 22M 162M 12% /boot/zipl

cat /etc/fstab
/dev/disk/by-path/ccw-0.0.15c0-part2 swap swap defaults 0 0
/dev/disk/by-path/ccw-0.0.15c0-part3 / ext4 acl,user_xattr 1 1
/dev/disk/by-path/ccw-0.0.15c0-part1 /boot/zipl ext2 acl,user_xattr 1 2

du -sh bin boot dev etc home lib lib64 lost+found mnt opt root run sbin selinux srv sys test tmp usr var
5.0M bin
114M boot
80K dev
21M etc
1.1M home
80M lib
16M lib64
16K lost+found
4.0K mnt
4.0K opt
22M root
9.2M run
12M sbin
4.0K selinux
92K srv
0 sys
4.0K test
40K tmp
4.4G usr
285M var