maple tree · Supported

Maintainers

• M Liam R. Howlett <liam@infradead.org>
• R Alice Ryhl <aliceryhl@google.com>
• R Andrew Ballance <andrewjballance@gmail.com>

Paths

• F Documentation/core-api/maple_tree.rst
• F include/linux/maple_tree.h
• F include/trace/events/maple_tree.h
• F lib/maple_tree.c
• F lib/test_maple_tree.c
• F rust/helpers/maple_tree.c
• F rust/kernel/maple_tree.rs
• F tools/testing/radix-tree/maple.c
• F tools/testing/shared/linux/maple_tree.h

Last 30 days

Most active threads (last 7 days)

• WARM2d [PATCH] lib/maple_tree: add missing spaces after switch keyword
  2026-06-23 06:20 · 0 replies in 7d · Watson Wheeler <hidden>

Recent patches

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

• WARM2d [PATCH] lib/maple_tree: add missing spaces after switch keyword
  2026-06-23 · Watson Wheeler <hidden>
• HOTtoday [PATCH RFC 04/12] mm/vmalloc: finalize maple-only indexing and shrink struct vmap_area
  2026-06-13 · Pranjal Arya <hidden>
• COOLING14d [PATCH] maple_tree: remove undocumented CONFIG_MAPLE_RCU_DISABLED macro
  2026-06-10 · Ethan Nelson-Moore <hidden>
• COLD20d [PATCH 2/3] rust: maple_tree: Add load_rcu()
  2026-06-05 · Boqun Feng <boqun@kernel.org>
• COLD20d [PATCH 2/3] rust: maple_tree: add load_rcu()
  2026-06-05 · Boqun Feng <boqun@kernel.org>
• COLD41d IN MM [PATCH v2] maple_tree: document that "last" in mtree_insert_range() is inclusive
  2026-05-12 · Steven Rostedt <rostedt@kernel.org>
• DORMANTno replies REVIEWED: 16 (16M) [PATCH v3] rust: maple_tree: implement Send and Sync for MapleTree
  2026-05-11 · Joel Fernandes <joelagnelf@nvidia.com>
• COLD47d [PATCH] maple_tree: document that "last" in mtree_insert_range() is inclusive
  2026-05-06 · Steven Rostedt <rostedt@goodmis.org>
• COLD30d [PATCH 2/2] Documentation: maple_tree: Clarify behavior when using reserved values
  2026-05-04 · Wei-Lin Chang <hidden>
• COLD30d [PATCH 1/2] Documentation: maple_tree: Point out constraint when using xa_{mk, to}_value
  2026-05-04 · Wei-Lin Chang <hidden>
• STALE63d [PATCH v2] rust: maple_tree: implement Send and Sync for MapleTree
  2026-04-22 · Joel Fernandes <joelagnelf@nvidia.com>
• DORMANTno replies LANDED [PATCH] MAINTAINERS: Update email address
  2026-04-22 · "Liam R. Howlett" <liam@infradead.org>
• STALE65d [PATCH RFC] rust: maple_tree: implement Send and Sync for MapleTree
  2026-04-20 · Joel Fernandes <joelagnelf@nvidia.com>
• DORMANTno replies [RFC PATCH 2/2] Documentation: maple_tree: Clarify behavior when using reserved values
  2026-04-18 · Wei-Lin Chang <hidden>
• STALE68d [RFC PATCH 1/2] Documentation: maple_tree: Point out constraint when using xa_{mk, to}_value
  2026-04-18 · Wei-Lin Chang <hidden>
• STALE85d [PATCH] lib/maple_tree: fix incorrect dead range comparison in mas_topiary_replace()
  2026-03-17 · Josh Law <hidden>
• STALE85d [PATCH v2] lib/maple_tree: fix potential NULL dereference in mas_pop_node()
  2026-03-13 · Josh Law <hidden>
• STALE85d [PATCH 1/3] lib/maple_tree: fix potential NULL dereference in mas_pop_node()
  2026-03-12 · Josh Law <hidden>
• STALE85d [PATCH 2/3] lib/maple_tree: fix always-true condition in mas_erase()
  2026-03-12 · Josh Law <hidden>
• STALE111d [PATCH] lib/maple_tree: fix swapped arguments in mas_safe_pivot() call
  2026-03-06 · Josh Law <hidden>
• COLD44d Re: [PATCH v3 21/30] maple_tree: Add cp_is_new_root() helper
  2026-02-03 · Liam R. Howlett <hidden>
• COLD44d Re: [PATCH v3 21/30] maple_tree: Add cp_is_new_root() helper
  2026-02-01 · SeongJae Park <sj@kernel.org>
• COLD44d [PATCH v3 17/30] maple_tree: Start using maple copy node for destination
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 30/30] maple_tree: Clean up mas_wr_node_store()
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 27/30] maple_tree: Remove maple big node and subtree structs
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 28/30] maple_tree: Pass maple copy node to mas_wmb_replace()
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 25/30] maple_tree: Add cp_converged() helper
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 23/30] maple_tree: Add test for rebalance calculation off-by-one
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 12/30] maple_tree: Testing update for spanning store
  2026-01-30 · Liam R. Howlett <hidden>
• COLD44d [PATCH v3 06/30] maple_tree: Make ma_wr_states reliable for reuse in spanning store
  2026-01-30 · Liam R. Howlett <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• DORMANTno replies REVIEWED: 16 (16M) [PATCH v3] rust: maple_tree: implement Send and Sync for MapleTree
  2026-05-11 · Joel Fernandes <joelagnelf@nvidia.com> · 2 Reviewed-by

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.

• STALE157d [PATCH 02/28] maple_tree: Extract use of big node from mas_wr_spanning_store()
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 01/28] maple_tree: Move mas_spanning_rebalance loop to function
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 03/28] maple_tree: Remove unnecessary assignment of orig_l index
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 04/28] maple_tree: inline mas_spanning_rebalance() into mas_wr_spanning_rebalance()
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 05/28] maple_tree: Make ma_wr_states reliable for reuse in spanning store
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 09/28] maple_tree: Correct right ma_wr_state end pivot in mas_wr_spanning_store()
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 07/28] maple_tree: Don't pass through height in mas_wr_spanning_store
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 08/28] maple_tree: Move maple_subtree_state from mas_wr_spanning_store to mas_wr_spanning_rebalance
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 06/28] maple_tree: Remove l_wr_mas from mas_wr_spanning_rebalance
  2026-01-15 · Liam R. Howlett <hidden>
• STALE157d [PATCH 11/28] maple_tree: Testing update for spanning store
  2026-01-15 · Liam R. Howlett <hidden>