tmpfs is another confusing name in Linux kernel, its implementation is in mm/shmem.c, shmem has no relation to tmpfs at first glance although we know tmpfs is based on memory. We can understand why we use this name by seeing where this is used.In a desktop Linux system, tmpfs is loaded usually:% grep tmpfs /proc/mountsdevtmpfs /dev devtmpfs rw,seclabel,nosuid,relatime,size=1958956k,nr_inodes=489739,mode=755 0 0tmpfs /dev/shm tmpfs rw,seclabel,nosuid,nodev,relatime 0 0tmpfs /run tmpfs rw,seclabel,nosuid,nodev,relatime,mode=755 0 0tmpfs /sys/fs/cgroup tmpfs rw,seclabel,nosuid,nodev,noexec,relati...