Нужно ли монтировать /dev/shm?

pinkbyte@phantom ~/dev/gentoo-dev/gentoo-x86 $ mount | grep shm
shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime)
pinkbyte@phantom ~/dev/gentoo-dev/gentoo-x86 $ cat /etc/fstab | grep shm
pinkbyte@phantom ~/dev/gentoo-dev/gentoo-x86 $

$ mount | grep shm
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)

$ cat /etc/fstab
# /etc/fstab: static file system information
#

/dev/sda2               /                       btrfs           noatime,max_inline=256,ssd_spread,discard,compress=lzo,space_cache,autodefrag,subvol=Dec2014  0 0