xarray · Supported

Maintainers

• M Matthew Wilcox <willy@infradead.org>

Paths

• F Documentation/core-api/idr.rst
• F Documentation/core-api/xarray.rst
• F include/linux/idr.h
• F include/linux/xarray.h
• F lib/idr.c
• F lib/region_alloc_benchmark.c
• F lib/test_xarray.c
• F lib/xarray.c
• F tools/testing/radix-tree

Last 30 days

Most active threads (last 7 days)

• WARM2d IN LINUX-NEXT [PATCH] xarray: fix index jumping backwards in xas_find()
  2026-09-04 12:13 · 1 reply in 7d · "syzbot" <syzbot@kernel.org>
• WARM3d [PATCH v5 00/12] rust: xarray: add entry API with preloading
  2026-09-02 13:28 · 1 reply in 7d · Andreas Hindborg <a.hindborg@kernel.org>

Active reviewers (last 30 days)

• <hidden>
  2 attestations (2 Reported-by) · last on 2026-09-04
• Tamir Duberstein <tamird@kernel.org>
  1 attestation (1 Suggested-by) · last on 2026-09-02

Recent patches

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

• WARM2d [PATCH v2] xarray: fix index jumping backwards in xas_find()
  2026-09-04 · Krystian Kaniewski <hidden>
• WARM2d IN LINUX-NEXT [PATCH] xarray: fix index jumping backwards in xas_find()
  2026-09-03 · "syzbot" <syzbot@kernel.org>
• WARM3d [PATCH v5 03/12] xarray: move xas_result() and xa_zero_to_null() to the header
  2026-09-02 · Andreas Hindborg <a.hindborg@kernel.org>
• COOLING6d [PATCH 6/7] docs: xarray: Fix xas_try_split() name
  2026-08-22 · Karl Mehltretter <hidden>
• COOLING6d [PATCH] XArray: document that tags persist after storing new elements
  2026-08-19 · Christoph Hellwig <hch@lst.de>
• DORMANTno replies IN MM: 16 (16M) [PATCH v3 2/2] xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc()
  2026-08-04 · Zi Yan <ziy@nvidia.com>
• COLD32d [PATCH v2 2/2] xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc()
  2026-07-31 · Zi Yan <ziy@nvidia.com>
• COLD38d [PATCH RFC] xarray: honor XA_FLAGS_ACCOUNT in xas_split_alloc()
  2026-07-28 · Zi Yan <ziy@nvidia.com>
• COLD40d [PATCH v3] lib: test bitmap vs IDA vs Maple Tree performance for region allocations
  2026-07-17 · Yury Norov <hidden>
• STALE81d Re: [PATCH] mm: khugepaged: free xarray nodes left behind by failed collapse_file()
  2026-06-16 · Matthew Wilcox <willy@infradead.org>
• STALE178d [PATCH v3 1/2] lib/idr: fix infinite loop in idr_get_next()
  2026-03-12 · Josh Law <hidden>
• DORMANTno replies [PATCH] lib/idr: fix memory leak in ida_alloc_range() error path
  2026-03-12 · Josh Law <hidden>
• STALE178d [PATCH v2] lib/idr: fix infinite loop in idr_get_next()
  2026-03-12 · Josh Law <hidden>
• DORMANTno replies [PATCH] lib/idr: fix infinite loop in idr_get_next()
  2026-03-12 · Josh Law <hidden>
• DORMANTno replies [PATCH v2] lib/idr: fix ida_find_first_range() missing IDs across chunk boundaries
  2026-03-06 · Josh Law <hidden>
• STALE184d [PATCH] lib/idr: fix ida_find_first_range() missing IDs across chunk boundaries
  2026-03-06 · Josh Law <hidden>
• STALE158d [RFC PATCH v3 2/2] XArray tests: Verify xa_erase behavior in check_split
  2026-02-23 · Ackerley Tng <hidden>
• STALE158d [RFC PATCH v3 1/2] XArray tests: Fix check_split tests to store correctly
  2026-02-23 · Ackerley Tng <hidden>
• DORMANTno replies [RFC PATCH v1 RESEND 2/2] XArray tests: Verify xa_erase behavior in check_split
  2026-02-23 · Ackerley Tng <hidden>
• STALE195d [RFC PATCH v1 RESEND 1/2] XArray tests: Fix check_split tests to store correctly
  2026-02-23 · Ackerley Tng <hidden>
• STALE209d [RFC PATCH v1 2/2] XArray tests: Verify xa_erase behavior in check_split
  2026-01-31 · Ackerley Tng <hidden>
• STALE209d [RFC PATCH v1 1/2] XArray tests: Fix check_split tests to store correctly
  2026-01-31 · Ackerley Tng <hidden>
• STALE220d [PATCH mm-new v5 2/5] mm: khugepaged: refine scan progress number
  2026-01-23 · Vernon Yang <hidden>
• STALE226d IN LINUX-NEXT [RFC PATCH] mm/khugepaged: free empty xa_nodes when rollbacks in collapse_file
  2026-01-21 · Jinjiang Tu <hidden>
• STALE232d Re: [PATCH mm-new v4 2/6] mm: khugepaged: refine scan progress number
  2026-01-17 · Vernon Yang <hidden>
• STALE243d Re: [bug report] memory leak of xa_node in collapse_file() when rollbacks
  2025-12-18 · Jinjiang Tu <hidden>
• STALE222d Re: [PATCH v4] lib: xarray: free unused spare node in xas_create_range()
  2025-12-15 · Jinjiang Tu <hidden>
• STALE222d REVIEWED: 16 (16M) Re: [PATCH v4] lib: xarray: free unused spare node in xas_create_range()
  2025-12-05 · "David Hildenbrand (Red Hat)" <david@kernel.org>
• STALE222d [PATCH v4] lib: xarray: free unused spare node in xas_create_range()
  2025-12-04 · Shardul Bankar <hidden>
• STALE276d [PATCH v3] lib: xarray: free unused spare node in xas_create_range()
  2025-12-01 · Shardul Bankar <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.

• STALE195d [RFC PATCH v1 RESEND 1/2] XArray tests: Fix check_split tests to store correctly
  2026-02-23 · Ackerley Tng <hidden>
• DORMANTno replies [RFC PATCH v1 RESEND 2/2] XArray tests: Verify xa_erase behavior in check_split
  2026-02-23 · Ackerley Tng <hidden>
• STALE158d [RFC PATCH v3 1/2] XArray tests: Fix check_split tests to store correctly
  2026-02-23 · Ackerley Tng <hidden>
• STALE158d [RFC PATCH v3 2/2] XArray tests: Verify xa_erase behavior in check_split
  2026-02-23 · Ackerley Tng <hidden>
• DORMANTno replies [PATCH v2] lib/idr: fix ida_find_first_range() missing IDs across chunk boundaries
  2026-03-06 · Josh Law <hidden>
• DORMANTno replies [PATCH] lib/idr: fix infinite loop in idr_get_next()
  2026-03-12 · Josh Law <hidden>
• DORMANTno replies [PATCH] lib/idr: fix memory leak in ida_alloc_range() error path
  2026-03-12 · Josh Law <hidden>