Active subsystems in linux-fsdevel

100 subsystems with patch activity in the last 7 days, busiest first. Each links to its own dashboard: recent patches, active threads and reviewers for the paths that subsystem claims in MAINTAINERS.

• memory management
  116 messages in 7d · last 2026-10-29 20:51 · Andrew Morton
• security subsystem Supported
  36 messages in 7d · last 2026-10-29 16:41 · Paul Moore et al.
• overlay filesystem Supported
  34 messages in 7d · last 2026-10-29 10:39 · Miklos Szeredi et al.
• kernel selftest framework
  31 messages in 7d · last 2026-10-29 16:41 · Shuah Khan et al.
• memory management - core
  30 messages in 7d · last 2026-10-29 20:43 · Andrew Morton et al.
• nfs, sunrpc, and lockd clients
  27 messages in 7d · last 2026-10-29 18:10 · Trond Myklebust et al.
• memory management - thp (transparent huge page)
  24 messages in 7d · last 2026-10-29 20:44 · Andrew Morton et al.
• page cache Supported
  24 messages in 7d · last 2026-10-29 20:36 · Matthew Wilcox et al.
• networking [general]
  23 messages in 7d · last 2026-10-29 16:41 · "David S. Miller" et al.
• memory mapping
  20 messages in 7d · last 2026-10-29 20:51 · Andrew Morton et al.
• documentation
  19 messages in 7d · last 2026-10-29 18:10 · Jonathan Corbet
• proc filesystem
  15 messages in 7d · last 2026-10-29 20:45
• bpf [general] (safe dynamic programs and tools) Supported
  14 messages in 7d · last 2026-10-29 16:41 · Alexei Starovoitov et al.
• capabilities Supported
  14 messages in 7d · last 2026-10-28 22:18 · Serge Hallyn
• memory management - userfaultfd
  13 messages in 7d · last 2026-10-29 20:42 · Andrew Morton et al.
• vfat/fat/msdos filesystem
  12 messages in 7d · last 2026-10-29 20:25 · OGAWA Hirofumi
• kernel smb3 server (ksmbd)
  12 messages in 7d · last 2026-10-28 06:20 · Namjae Jeon et al.
• selinux security module Supported
  12 messages in 7d · last 2026-10-27 11:39 · Paul Moore et al.
• filesystems [iomap] Supported
  11 messages in 7d · last 2026-10-29 20:51 · Christian Brauner
• kernel nfsd, sunrpc, and lockd servers Supported
  11 messages in 7d · last 2026-10-28 16:37 · Chuck Lever et al.
• ext4 file system
  10 messages in 7d · last 2026-10-29 16:09 · "Theodore Ts'o"
• exfat file system
  10 messages in 7d · last 2026-10-29 16:08 · Namjae Jeon et al.
• ecrypt file system Odd Fixes
  10 messages in 7d · last 2026-10-29 16:07 · Tyler Hicks
• smack security module
  10 messages in 7d · last 2026-10-27 11:39 · Casey Schaufler
• ntfs3 filesystem Supported
  9 messages in 7d · last 2026-10-29 22:59 · Konstantin Komarov
• filesystems (vfs and infrastructure)
  9 messages in 7d · last 2026-10-29 18:10 · Alexander Viro et al.
• fuse filesystem [core] Supported
  9 messages in 7d · last 2026-10-29 03:37 · Miklos Szeredi
• memory management - gup (get user pages)
  8 messages in 7d · last 2026-10-29 20:38 · Andrew Morton et al.
• exec & binfmt api, elf Supported
  8 messages in 7d · last 2026-10-29 20:34 · Kees Cook
• bpf [selftests] (test runners & infrastructure)
  8 messages in 7d · last 2026-10-29 16:41 · Andrii Nakryiko et al.
• btrfs file system
  8 messages in 7d · last 2026-10-29 16:09 · David Sterba
• drm drivers
  8 messages in 7d · last 2026-10-28 16:37 · David Airlie et al.
• tmpfs (shmem filesystem)
  7 messages in 7d · last 2026-10-29 20:34 · Hugh Dickins
• scheduler
  7 messages in 7d · last 2026-10-29 20:34 · Ingo Molnar et al.
• block layer
  7 messages in 7d · last 2026-10-27 21:58 · Jens Axboe
• extended verification module (evm) Supported
  7 messages in 7d · last 2026-10-27 11:39 · Mimi Zohar et al.
• integrity measurement architecture (ima) Supported
  7 messages in 7d · last 2026-10-27 11:39 · Mimi Zohar et al.
• memory management - ksm (kernel samepage merging)
  6 messages in 7d · last 2026-10-29 20:43 · Andrew Morton et al.
• landlock security module Supported
  6 messages in 7d · last 2026-10-29 16:41 · Mickaël Salaün
• bpf [security & lsm] (security audit and enforcement using bpf)
  6 messages in 7d · last 2026-10-29 16:41 · KP Singh et al.
• ntfs filesystem
  6 messages in 7d · last 2026-10-29 16:08 · Namjae Jeon et al.
• networking [ipv4/ipv6]
  6 messages in 7d · last 2026-10-28 16:38 · David Ahern et al.
• memory management - swap
  5 messages in 7d · last 2026-10-29 20:43 · Andrew Morton et al.
• tracing
  5 messages in 7d · last 2026-10-29 18:59 · Steven Rostedt et al.
• xfs filesystem Supported
  5 messages in 7d · last 2026-10-29 16:09 · Carlos Maiolino
• gfs2 file system Supported
  5 messages in 7d · last 2026-10-29 16:09 · Andreas Gruenbacher
• zonefs filesystem
  5 messages in 7d · last 2026-10-29 16:08 · Damien Le Moal et al.
• proc sysctl
  5 messages in 7d · last 2026-10-29 14:12 · Kees Cook et al.
• userspace copyin/copyout (uiovec)
  5 messages in 7d · last 2026-10-29 14:00 · Alexander Viro
• x86 architecture (32-bit and 64-bit)
  5 messages in 7d · last 2026-10-28 16:36 · Thomas Gleixner et al.
• filesystems [stackable]
  4 messages in 7d · last 2026-10-29 21:18 · Miklos Szeredi et al.
• hugetlb subsystem
  4 messages in 7d · last 2026-10-29 20:42 · Muchun Song et al.
• generic include/asm header files
  4 messages in 7d · last 2026-10-29 20:40 · Arnd Bergmann
• live update
  4 messages in 7d · last 2026-10-29 20:34 · Pasha Tatashin et al.
• memory management - mglru (multi-gen lru)
  4 messages in 7d · last 2026-10-29 20:33 · Andrew Morton
• memory management - reclaim
  4 messages in 7d · last 2026-10-29 20:33 · Andrew Morton et al.
• ext2 file system
  4 messages in 7d · last 2026-10-29 16:07 · Jan Kara
• arm64 port (aarch64 architecture)
  4 messages in 7d · last 2026-10-28 16:39 · Catalin Marinas et al.
• netfilter
  4 messages in 7d · last 2026-10-28 16:38 · Pablo Neira Ayuso et al.
• driver core, kobjects, debugfs and sysfs Supported
  4 messages in 7d · last 2026-10-28 16:37 · Greg Kroah-Hartman et al.
• kernel virtual machine for x86 (kvm/x86) Supported
  4 messages in 7d · last 2026-10-27 15:47 · Sean Christopherson et al.
• memory management - misc
  3 messages in 7d · last 2026-10-29 20:45 · Andrew Morton et al.
• memory hot(un)plug
  3 messages in 7d · last 2026-10-29 20:41 · David Hildenbrand et al.
• oracle cluster filesystem 2 (ocfs2) Supported
  3 messages in 7d · last 2026-10-29 16:08 · Mark Fasheh et al.
• hfs filesystem
  3 messages in 7d · last 2026-10-29 16:08 · Viacheslav Dubeyko et al.
• nilfs2 filesystem
  3 messages in 7d · last 2026-10-29 16:07 · Ryusuke Konishi et al.
• rds - reliable datagram sockets Supported
  3 messages in 7d · last 2026-10-28 16:38 · Allison Henderson
• inotify
  3 messages in 7d · last 2026-10-28 16:36 · Jan Kara
• fsnotify: filesystem notification infrastructure
  3 messages in 7d · last 2026-10-28 16:36 · Jan Kara
• xarray Supported
  3 messages in 7d · last 2026-10-28 08:20 · Matthew Wilcox
• radeon and amdgpu drm drivers Supported
  3 messages in 7d · last 2026-10-28 08:20 · Alex Deucher et al.
• iommufd
  3 messages in 7d · last 2026-10-27 15:47 · Jason Gunthorpe et al.
• iommu subsystem
  3 messages in 7d · last 2026-10-27 15:47 · Joerg Roedel et al.
• apparmor security module Supported
  3 messages in 7d · last 2026-10-27 11:38 · John Johansen et al.
• ceph distributed file system client (ceph) Supported
  3 messages in 7d · last 2026-10-25 18:43 · Ilya Dryomov et al.
• kernfs Supported
  3 messages in 7d · last 2026-10-24 21:34 · Greg Kroah-Hartman et al.
• memory management - numa placement
  2 messages in 7d · last 2026-10-29 20:44 · Andrew Morton et al.
• memory mapping - madvise (memory advice)
  2 messages in 7d · last 2026-10-29 20:41 · Andrew Morton et al.
• mmu gather and tlb invalidation
  2 messages in 7d · last 2026-10-29 20:40 · Will Deacon et al.
• memory management - rmap (reverse mapping)
  2 messages in 7d · last 2026-10-29 20:35 · Andrew Morton et al.
• ubi file system (ubifs) Supported
  2 messages in 7d · last 2026-10-29 16:09 · Richard Weinberger
• hpfs filesystem
  2 messages in 7d · last 2026-10-29 16:08 · Mikulas Patocka
• hfsplus filesystem
  2 messages in 7d · last 2026-10-29 16:08 · Viacheslav Dubeyko et al.
• aio Supported
  2 messages in 7d · last 2026-10-29 14:00 · Benjamin LaHaise
• pidfd api
  2 messages in 7d · last 2026-10-28 22:18 · Christian Brauner
• afs filesystem Supported
  2 messages in 7d · last 2026-10-28 18:59 · David Howells et al.
• filesystems [netfs library] Supported
  2 messages in 7d · last 2026-10-28 18:12 · David Howells et al.
• networking drivers
  2 messages in 7d · last 2026-10-28 16:38 · Andrew Lunn et al.
• vrf
  2 messages in 7d · last 2026-10-28 16:38 · David Ahern
• ipvs
  2 messages in 7d · last 2026-10-28 16:38 · Simon Horman et al.
• ieee 802.15.4 subsystem
  2 messages in 7d · last 2026-10-28 16:38 · Alexander Aring et al.
• sctp protocol
  2 messages in 7d · last 2026-10-28 16:37 · Marcelo Ricardo Leitner et al.
• intel drm i915 driver (meteor lake, dg2 and older excluding poulsbo, moorestown and derivative) Supported
  2 messages in 7d · last 2026-10-28 16:37 · Jani Nikula et al.
• networking [mptcp]
  2 messages in 7d · last 2026-10-28 16:37 · Matthieu Baerts et al.
• tipc network layer
  2 messages in 7d · last 2026-10-28 16:37 · Jon Maloy et al.
• scsi subsystem
  2 messages in 7d · last 2026-10-28 16:36 · "James E.J. Bottomley" et al.
• xen hypervisor interface Supported
  2 messages in 7d · last 2026-10-28 16:36 · Juergen Gross et al.
• infiniband subsystem Supported
  2 messages in 7d · last 2026-10-28 16:36 · Jason Gunthorpe et al.
• superh
  2 messages in 7d · last 2026-10-28 16:36 · Yoshinori Sato et al.
• s390 architecture Supported
  2 messages in 7d · last 2026-10-28 16:36 · Heiko Carstens et al.