[$] Huge pages in the ext4 filesystem

When the transparent huge page feature was added to the kernel, it onlysupported anonymous (non-file-backed) memory. In 2016, support for huge pages in the page cache wasadded, but only the tmpfs filesystem was supported. There is interest inexpanding support to other filesystems, since, for some workloads, theperformance improvement can be significant. Kirill Shutemov led the onlysession that combined just the filesystem and memory-management tracks atthe 2017 Linux Storage, Filesystem, and Memory-Management Summit in adiscussion of adding huge-page support to the ext4 filesystem.