Experiment: atomic buf page fields - #6130

Draft

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percona:8.4from

polchawa-percona:atomic-buf-page-fields

Commits on Aug 21, 2026

Make buf_page_t::state and access_time atomic

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359636b
PoC: lock-free fast path for buf_page_optimistic_get

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114c3f5

Commits on Aug 22, 2026

Inline the fix_epoch correctness proof into the code

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1a7b432
Correct false claim: Site 1 is not reached by DISCARD TABLESPACE

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b98b888

Commits on Aug 25, 2026

Document the never-reset requirement on fix_epoch as a proven invariant

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306a80d
Document why modify_clock's fast-path check needs no fix_epoch bracket

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2bce223

Commits on Aug 28, 2026

Revert fix_epoch PoC: caller-held buf-fix already excludes eviction

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6d4290b
Bump buf_page_t::state/access_time to seq_cst, defense in depth

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869038a
Remove block_mutex from buf_page_optimistic_get's fast path

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bc194b8