New Arena Range - #855

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Matthew Parkinson (mjp41) wants to merge 15 commits into

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BackendArenaRange

Commits on Aug 5, 2026

Fix double base-adjust in FlatPagemap::get_mut<true>

Matthew Parkinson (mjp41)
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95d202a
Fix compile-time aligned alloc/dealloc asymmetry

Matthew Parkinson (mjp41)
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75febc9
Add ArenaBins<B>: bin scheme, per-sc tables, and bitmap

Matthew Parkinson (mjp41)
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f6227eb
Add RBTree::neighbours probe helper

Matthew Parkinson (mjp41)
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88b2a42
Add Arena: dual-tree free-range manager with consolidation

Matthew Parkinson (mjp41)
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7a305b5
Arena: representation-agnostic Rep concept + boundary support

Matthew Parkinson (mjp41)
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f8adf4e
Add LargeArenaRange and generalise Arena to byte units

Matthew Parkinson (mjp41)
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6921ca6
Substitute LargeBuddyRange with LargeArenaRange in default range pipelines

Matthew Parkinson (mjp41)
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4d9b61a
Uniform sizeclass encoding for small and large allocations

Matthew Parkinson (mjp41)
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0059958
Per-chunk pagemap offset encoding

Matthew Parkinson (mjp41)
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79ba787
Front-end: request non-pow2 large allocations

Matthew Parkinson (mjp41)
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333ac5c
Add non-pow2 metadata sub-allocator: InplaceRep + SmallArenaRange

Matthew Parkinson (mjp41)
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9948f4c
Wire SmallArenaRange in as the LocalMetaRange

Matthew Parkinson (mjp41)
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667e114
Remove buddy allocators

Matthew Parkinson (mjp41)
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9eec94f
Add docs/Arena.md

Matthew Parkinson (mjp41)
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8016c32