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scylladb/mutation
Tomasz Grabiec 938b993331 Merge 'Fix a few rare bugs in row cache' from Michał Chojnowski
This is a loose collection of fixes to rare row cache bugs flushed out by running test_concurrent_reads_and_eviction several million times. See individual commits for details.

Fixes #15483

Closes scylladb/scylladb#15945

* github.com:scylladb/scylladb:
  partition_version: fix violation of "older versions are evicted first" during schema upgrades
  cache_flat_mutation_reader: fix a broken iterator validity guarantee in ensure_population_lower_bound()
  cache_flat_mutation_reader: fix a continuity loss in maybe_update_continuity()
  cache_flat_mutation_reader: fix continuity losses during cache population races with reverse reads
  partition_snapshot_row_cursor: fix a continuity loss in ensure_entry_in_latest() with reverse reads
  cache_flat_mutation_reader: fix some cache mispopulations with reverse reads
  cache_flat_mutation_reader: fix a logic bug in ensure_population_lower_bound() with reverse reads
  cache_flat_mutation_reader: never make an unlinked last dummy continuous

(cherry picked from commit 6bcf3ac86c)
2024-01-15 16:47:56 +02:00
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