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[2026.10.7] Backport: SSI write-skew fixes (both misses) — supersedes #247 - #258

Merged

gburd merged 6 commits into

lts/2026.10.7from

backport/2026.10.7/ssi-second-miss

Nov 3, 2026

Merged

[2026.10.7] Backport: SSI write-skew fixes (both misses) — supersedes #247#258
gburd merged 6 commits into
lts/2026.10.7from
backport/2026.10.7/ssi-second-miss

Commits on Nov 3, 2026
- lock: SSI must not drop its own SIREAD marker when write-locking the page
  
  libdb-agent
  authored and
  gburd
  committed
  5bca388
- lock,mp: SSI must detect write skew on waited writes and at the lazy-read_lsn boundary
  gburd
  committed
  b803b8c
- lock,mp: SSI livelocked under retry; restore a strict edge test, scan from the reader side
  gburd
  committed
  71dac9c
- test/isolation: gate SSI progress, not just serializability
  gburd
  committed
  c4d7343
- test: MANIFEST on the LTS line lists only tests the LTS line has
  gburd
  committed
  84717f4
- Merge branch 'lts/2026.10.7' into backport/2026.10.7/ssi-second-miss
  gburd
  authored
  0069121