<a href="https://man7.org/linux/man-pages/man7/xattr.7.html">Extended
attributes</a> (xattrs) provide a way to attach <span class="nobreak">key/value</span> metadata to
inodes—files, directories, and the like—in a filesystem. As with many
Linux filesystems, the <a
href="https://docs.kernel.org/filesystems/fuse/">FUSE filesystem</a>
supports xattrs. In a filesystem-track session at the 2026 <a
href="https://events.linuxfoundation.org/lsfmmbpf/">Linux Storage,
Filesystem, Memory Management, and BPF Summit</a>, FUSE maintainer Miklos
Szeredi led a discussion about caching xattrs in kernel memory; he would
like to create some common infrastructure that could be used by FUSE and
shared with other filesystems.