hugetlb subsystem · Maintained

Maintainers

• M Muchun Song <muchun.song@linux.dev>
• M Oscar Salvador <osalvador@suse.de>
• R David Hildenbrand <david@kernel.org>

Paths

• F Documentation/ABI/testing/sysfs-kernel-mm-hugepages
• F Documentation/admin-guide/mm/hugetlbpage.rst
• F Documentation/mm/hugetlbfs_reserv.rst
• F Documentation/mm/vmemmap_dedup.rst
• F fs/hugetlbfs/
• F include/linux/hugetlb.h
• F include/trace/events/hugetlbfs.h
• F mm/hugetlb.c
• F mm/hugetlb_cgroup.c
• F mm/hugetlb_cma.c
• F mm/hugetlb_cma.h
• F mm/hugetlb_sysctl.c
• F mm/hugetlb_sysfs.c
• F mm/hugetlb_vmemmap.c
• F mm/hugetlb_vmemmap.h
• F tools/testing/selftests/cgroup/test_hugetlb_memcg.c

Last 30 days

Active reviewers (last 30 days)

• Oscar Salvador (SUSE) <osalvador@suse.de>
  5 attestations (3 Acked-by, 2 Reviewed-by) · last on 2026-06-02
• Mike Rapoport (Microsoft) <rppt@kernel.org>
  4 attestations (3 Acked-by, 1 Reviewed-by) · last on 2026-06-02

Recent patches

Most-recent 30 patches in this subsystem on linuxppc-dev (capped at 30), ordered by date desc.

• COOLING7d [PATCH v3 18/19] mm/hugetlb: Remove unused bootmem cma field
  2026-06-02 · Muchun Song <hidden>
• COOLING7d [PATCH v3 17/19] mm/sparse-vmemmap: Remove sparse_vmemmap_init_nid_late()
  2026-06-02 · Muchun Song <hidden>
• COOLING7d [PATCH v3 16/19] mm/hugetlb: Remove obsolete bootmem cross-zone checks
  2026-06-02 · Muchun Song <hidden>
• COOLING7d [PATCH v3 15/19] mm/hugetlb_vmemmap: Move bootmem HVO setup to early init
  2026-06-02 · Muchun Song <hidden>
• COOLING7d [PATCH v3 14/19] mm/hugetlb: Free cross-zone bootmem gigantic pages after allocation
  2026-06-02 · Muchun Song <hidden>
• COOLING7d REVIEWED: 13 (13M) [PATCH v3 13/19] mm/hugetlb: Refactor early boot gigantic hugepage allocation
  2026-06-02 · Muchun Song <hidden>
• COOLING7d REVIEWED: 13 (13M) [PATCH v3 12/19] mm/hugetlb_cma: Validate hugetlb CMA range by zone at reserve time
  2026-06-02 · Muchun Song <hidden>
• COOLING7d REVIEWED: 13 (13M) [PATCH v3 04/19] mm/hugetlb: Initialize gigantic bootmem hugepage struct pages earlier
  2026-06-02 · Muchun Song <hidden>
• COOLING7d REVIEWED: 2 (2M) [PATCH v3 02/19] mm/hugetlb_vmemmap: Fix __hugetlb_vmemmap_optimize_folios()
  2026-06-02 · Muchun Song <hidden>
• COOLING7d REVIEWED: 2 (2M) [PATCH v3 01/19] mm/hugetlb: Fix boot panic with CONFIG_DEBUG_VM and HVO bootmem pages
  2026-06-02 · Muchun Song <hidden>
• COLD17d [PATCH v2 69/69] Documentation/mm: Rewrite vmemmap_dedup.rst for unified HVO
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 68/69] mm/mm_init: Initialize pageblock migratetype in memmap init helpers
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 66/69] mm/cma: Move CMA pageblock initialization into cma_activate_area()
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 64/69] mm/mm_init: Factor out compound page initialization
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 63/69] mm/hugetlb: Initialize the full bootmem hugepage in hugetlb code
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 62/69] mm/hugetlb: Simplify hugetlb_folio_init_vmemmap()
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 61/69] mm/hugetlb: Drop boot-time HVO handling for gigantic folios
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 58/69] mm/hugetlb: Make HVO optimizable checks depend on generic logic
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 57/69] mm/sparse-vmemmap: Consolidate HVO enable checks
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 56/69] mm: Redefine HVO as Hugepage Vmemmap Optimization
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 49/69] mm/hugetlb_vmemmap: Remove vmemmap_wrprotect_hvo()
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 37/69] mm/sparse-vmemmap: Factor out shared vmemmap page allocation
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 36/69] mm/hugetlb: Remove HUGE_BOOTMEM_CMA
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 35/69] mm/hugetlb: Remove HUGE_BOOTMEM_HVO
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 30/69] mm/hugetlb: Switch HugeTLB to section-based vmemmap optimization
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 28/69] mm/hugetlb: Use generic vmemmap optimization macros
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 21/69] mm: Rename vmemmap optimization macros around folio semantics
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 18/69] mm/hugetlb: Remove unused bootmem cma field
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 17/69] mm/sparse-vmemmap: Remove sparse_vmemmap_init_nid_late()
  2026-05-13 · Muchun Song <hidden>
• COLD17d [PATCH v2 16/69] mm/hugetlb: Remove obsolete bootmem cross-zone checks
  2026-05-13 · Muchun Song <hidden>

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• STALE130d [PATCH v4 13/54] convert hugetlbfs
  2025-11-18 · Al Viro <viro@zeniv.linux.org.uk>
• STALE160d [PATCH 26/28] mm, arch: consolidate hugetlb CMA reservation
  2025-12-28 · Mike Rapoport <rppt@kernel.org>
• STALE111d [PATCH v2 26/28] mm, arch: consolidate hugetlb CMA reservation
  2026-01-02 · Mike Rapoport <rppt@kernel.org>
• STALE139d [PATCH v2 06/11] mm: Add helpers to create migration entries from struct pages
  2026-01-07 · Jordan Niethe <hidden>
• STALE93d [PATCH v3 27/29] mm, arch: consolidate hugetlb CMA reservation
  2026-01-11 · Mike Rapoport <rppt@kernel.org>
• STALE133d [PATCH v3 06/13] mm: Add helpers to create migration entries from struct pages
  2026-01-23 · Jordan Niethe <hidden>
• STALE132d [PATCH v4 06/13] mm: Add helpers to create migration entries from struct pages
  2026-01-30 · Jordan Niethe <hidden>
• STALE125d [PATCH v5 06/13] mm: Add helpers to create migration entries from struct pages
  2026-01-30 · Jordan Niethe <hidden>
• COLD43d [PATCH 04/49] mm/sparse: add a @pgmap parameter to arch vmemmap_populate()
  2026-04-05 · Muchun Song <hidden>
• COLD43d [PATCH 15/49] mm/hugetlb: free cross-zone bootmem gigantic pages after allocation
  2026-04-05 · Muchun Song <hidden>