Active subsystems in linux-mm

99 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
  268 messages in 7d · last 2026-10-26 17:42 · Andrew Morton
• kernel selftest framework
  45 messages in 7d · last 2026-10-26 01:49 · Shuah Khan et al.
• documentation
  37 messages in 7d · last 2026-10-26 11:27 · Jonathan Corbet
• memory management - core
  35 messages in 7d · last 2026-10-26 13:01 · Andrew Morton et al.
• live update
  32 messages in 7d · last 2026-10-26 17:42 · Pasha Tatashin et al.
• hugetlb subsystem
  31 messages in 7d · last 2026-10-26 09:41 · Muchun Song et al.
• damon
  30 messages in 7d · last 2026-10-26 13:56 · SJ Park
• memory management - mglru (multi-gen lru)
  30 messages in 7d · last 2026-10-25 01:31 · Andrew Morton
• memory management - misc
  29 messages in 7d · last 2026-10-26 11:27 · Andrew Morton et al.
• zram compressed ram block device drvier
  28 messages in 7d · last 2026-10-25 02:19 · Minchan Kim et al.
• block layer
  28 messages in 7d · last 2026-10-25 02:19 · Jens Axboe
• memory management - reclaim
  26 messages in 7d · last 2026-10-25 01:31 · Andrew Morton et al.
• control group - memory resource controller (memcg)
  24 messages in 7d · last 2026-10-26 12:02 · Johannes Weiner et al.
• tmpfs (shmem filesystem)
  21 messages in 7d · last 2026-10-26 14:31 · Hugh Dickins
• memory management - page allocator
  21 messages in 7d · last 2026-10-26 02:56 · Andrew Morton et al.
• kernel virtual machine (kvm) Supported
  19 messages in 7d · last 2026-10-22 23:27 · Paolo Bonzini
• memory mapping
  18 messages in 7d · last 2026-10-26 10:32 · Andrew Morton et al.
• page cache Supported
  18 messages in 7d · last 2026-10-26 10:32 · Matthew Wilcox et al.
• memory management - swap
  16 messages in 7d · last 2026-10-26 15:19 · Andrew Morton et al.
• kexec handover (kho)
  13 messages in 7d · last 2026-10-26 17:42 · Mike Rapoport et al.
• bpf [general] (safe dynamic programs and tools) Supported
  13 messages in 7d · last 2026-10-22 01:58 · Alexei Starovoitov et al.
• slab allocator
  12 messages in 7d · last 2026-10-24 19:08 · Vlastimil Babka et al.
• zswap compressed swap caching
  12 messages in 7d · last 2026-10-22 23:27 · Johannes Weiner et al.
• vmalloc
  11 messages in 7d · last 2026-10-26 10:25 · Andrew Morton et al.
• memory management - migration
  10 messages in 7d · last 2026-10-26 02:56 · Andrew Morton et al.
• memory management - thp (transparent huge page)
  9 messages in 7d · last 2026-10-26 15:20 · Andrew Morton et al.
• risc-v architecture Supported
  9 messages in 7d · last 2026-10-26 12:23 · Paul Walmsley et al.
• drm drivers
  8 messages in 7d · last 2026-10-21 06:06 · David Airlie et al.
• control group (cgroup)
  7 messages in 7d · last 2026-10-22 04:29 · Tejun Heo et al.
• bpf [selftests] (test runners & infrastructure)
  7 messages in 7d · last 2026-10-22 01:58 · Andrii Nakryiko et al.
• arm mali tyr drm driver Supported
  7 messages in 7d · last 2026-10-20 08:25 · Daniel Almeida et al.
• drm drivers and common infrastructure [rust] Supported
  7 messages in 7d · last 2026-10-20 08:25 · Danilo Krummrich et al.
• arm64 port (aarch64 architecture)
  6 messages in 7d · last 2026-10-26 13:30 · Catalin Marinas et al.
• kernel nfsd, sunrpc, and lockd servers Supported
  6 messages in 7d · last 2026-10-24 22:12 · Chuck Lever et al.
• filesystems [iomap] Supported
  6 messages in 7d · last 2026-10-24 22:11 · Christian Brauner
• exec & binfmt api, elf Supported
  6 messages in 7d · last 2026-10-23 01:54 · Kees Cook
• memblock and memory management initialization
  6 messages in 7d · last 2026-10-22 12:28 · Mike Rapoport
• memory management - numa placement
  5 messages in 7d · last 2026-10-26 09:40 · Andrew Morton et al.
• nfs, sunrpc, and lockd clients
  5 messages in 7d · last 2026-10-24 22:12 · Trond Myklebust et al.
• x86 architecture (32-bit and 64-bit)
  5 messages in 7d · last 2026-10-23 01:50 · Thomas Gleixner et al.
• dma buffer sharing framework
  5 messages in 7d · last 2026-10-21 15:43 · Sumit Semwal et al.
• filesystems (vfs and infrastructure)
  4 messages in 7d · last 2026-10-24 22:11 · Alexander Viro et al.
• memory management - allocation profiling (alloc tag)
  4 messages in 7d · last 2026-10-22 17:38 · Suren Baghdasaryan
• uprobes
  4 messages in 7d · last 2026-10-22 01:58 · Masami Hiramatsu et al.
• scheduler
  4 messages in 7d · last 2026-10-22 01:58 · Ingo Molnar et al.
• sparc + ultrasparc (sparc/sparc64)
  4 messages in 7d · last 2026-10-21 23:35 · "David S. Miller" et al.
• dma-buf heaps framework
  4 messages in 7d · last 2026-10-21 15:44 · Sumit Semwal
• rust Supported
  4 messages in 7d · last 2026-10-20 08:25 · Miguel Ojeda
• memory mapping - locking
  3 messages in 7d · last 2026-10-26 13:35 · Andrew Morton et al.
• memory management - ksm (kernel samepage merging)
  3 messages in 7d · last 2026-10-26 13:01 · Andrew Morton et al.
• linux for powerpc (32-bit and 64-bit) Supported
  3 messages in 7d · last 2026-10-26 08:03 · Madhavan Srinivasan
• kmsan
  3 messages in 7d · last 2026-10-26 08:03 · Alexander Potapenko
• kasan
  3 messages in 7d · last 2026-10-26 04:37 · Andrey Ryabinin
• proc filesystem
  3 messages in 7d · last 2026-10-25 10:43
• kernel virtual machine for x86 (kvm/x86) Supported
  3 messages in 7d · last 2026-10-22 23:27 · Sean Christopherson et al.
• security subsystem Supported
  3 messages in 7d · last 2026-10-21 15:43 · Paul Moore et al.
• kfence
  2 messages in 7d · last 2026-10-26 12:23 · Alexander Potapenko et al.
• page state debug script
  2 messages in 7d · last 2026-10-26 00:44 · Ye Liu
• memory mapping - madvise (memory advice)
  2 messages in 7d · last 2026-10-23 13:48 · Andrew Morton et al.
• tracing
  2 messages in 7d · last 2026-10-22 17:38 · Steven Rostedt et al.
• memory management - rmap (reverse mapping)
  2 messages in 7d · last 2026-10-21 20:36 · Andrew Morton et al.
• selinux security module Supported
  2 messages in 7d · last 2026-10-21 15:43 · Paul Moore et al.
• driver core, kobjects, debugfs and sysfs Supported
  2 messages in 7d · last 2026-10-21 12:52 · Greg Kroah-Hartman et al.
• loongarch
  2 messages in 7d · last 2026-10-21 08:31 · Huacai Chen
• userspace copyin/copyout (uiovec)
  1 message in 7d · last 2026-10-26 18:06 · Alexander Viro
• zsmalloc compressed slab memory allocator
  1 message in 7d · last 2026-10-26 10:32 · Minchan Kim et al.
• infiniband subsystem Supported
  1 message in 7d · last 2026-10-26 02:05 · Jason Gunthorpe et al.
• xarray Supported
  1 message in 7d · last 2026-10-24 01:43 · Matthew Wilcox
• sound
  1 message in 7d · last 2026-10-23 10:21 · Jaroslav Kysela et al.
• arm port Odd Fixes
  1 message in 7d · last 2026-10-23 01:50 · Russell King
• s390 architecture Supported
  1 message in 7d · last 2026-10-23 01:50 · Heiko Carstens et al.
• code tagging
  1 message in 7d · last 2026-10-22 17:38 · Suren Baghdasaryan et al.
• memory hot(un)plug
  1 message in 7d · last 2026-10-22 05:22 · David Hildenbrand et al.
• memory management - userfaultfd
  1 message in 7d · last 2026-10-22 03:47 · Andrew Morton et al.
• control group - device memory controller (dmem)
  1 message in 7d · last 2026-10-21 22:55 · Maarten Lankhorst et al.
• bpf [memory management extensions]
  1 message in 7d · last 2026-10-21 22:00 · Roman Gushchin et al.
• crypto api
  1 message in 7d · last 2026-10-21 20:57 · Herbert Xu et al.
• zstd
  1 message in 7d · last 2026-10-21 20:57 · Nick Terrell et al.
• bpf [core]
  1 message in 7d · last 2026-10-21 19:58 · Alexei Starovoitov et al.
• pci subsystem Supported
  1 message in 7d · last 2026-10-21 15:25 · Bjorn Helgaas
• kernel automounter
  1 message in 7d · last 2026-10-21 12:52 · Ian Kent
• kernfs Supported
  1 message in 7d · last 2026-10-21 12:52 · Greg Kroah-Hartman et al.
• user-mode linux (uml)
  1 message in 7d · last 2026-10-21 11:48 · Richard Weinberger et al.
• smack security module
  1 message in 7d · last 2026-10-21 11:48 · Casey Schaufler
• iommu subsystem
  1 message in 7d · last 2026-10-21 11:48 · Joerg Roedel et al.
• s390 iommu (pci) Supported
  1 message in 7d · last 2026-10-21 11:48 · Niklas Schnelle et al.
• fanotify
  1 message in 7d · last 2026-10-21 11:48 · Jan Kara
• fsnotify: filesystem notification infrastructure
  1 message in 7d · last 2026-10-21 11:48 · Jan Kara
• networking [general]
  1 message in 7d · last 2026-10-21 11:47 · "David S. Miller" et al.
• maple tree Supported
  1 message in 7d · last 2026-10-21 11:47 · Liam R. Howlett
• open firmware and flattened device tree
  1 message in 7d · last 2026-10-21 08:32 · Rob Herring et al.
• dma mapping helpers Supported
  1 message in 7d · last 2026-10-21 08:32 · Marek Szyprowski
• kdump
  1 message in 7d · last 2026-10-21 08:31 · Andrew Morton et al.
• drm driver for nvidia geforce/quadro gpus Supported
  1 message in 7d · last 2026-10-21 06:06 · Lyude Paul et al.
• drm drivers and misc gpu patches
  1 message in 7d · last 2026-10-21 06:06 · Maarten Lankhorst et al.
• hmm - heterogeneous memory management
  1 message in 7d · last 2026-10-21 06:06 · Jason Gunthorpe et al.
• memory management - oom killer
  1 message in 7d · last 2026-10-21 02:40 · Michal Hocko
• rust [sync]
  1 message in 7d · last 2026-10-20 08:25 · Boqun Feng et al.
• memory management - rust
  1 message in 7d · last 2026-10-20 08:25 · Alice Ryhl