[$] Huge pages in the ext4 filesystem
When the transparent huge page feature was added to the kernel, it only
supported anonymous (non-file-backed) memory. In 2016, support for huge pages in the page cache was
added, but only the tmpfs filesystem was supported. There is interest in
expanding support to other filesystems, since, for some workloads, the
performance improvement can be significant. Kirill Shutemov led the only
session that combined just the filesystem and memory-management tracks at
the 2017 Linux Storage, Filesystem, and Memory-Management Summit in a
discussion of adding huge-page support to the ext4 filesystem.