Tmpfs extended attributes

configname: CONFIG_TMPFS_XATTR

Linux Kernel Configuration
└─>File systems
└─>Pseudo filesystems
└─>Tmpfs extended attributes
In linux kernel since version 3 (release Date: 2011-07-21)  
Extended attributes are name:value pairs associated with inodes by
the kernel or by users (see the attr(5) manual page, or visit
<http://acl.bestbits.at/> for details).

Currently this enables support for the trusted.* and
security.* namespaces.

You need this for POSIX ACL support on tmpfs.

If unsure, say N.

depends
CONFIG_TMPFS

is depended by
CONFIG_TMPFS_POSIX_ACL