fix(blocks): a BAM flush reads and writes only the pages that hold the volume's bits (#155)

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Accepted in full:
- amd64, aarch64, riscv64: PARITY:V4_POST tests=538 pass=538 fail=0,
  POST: PASSED, [zuse@Hera] ok> on a fresh data stick; dict_hash
  0xfec8c47cfc6f437f on the three
- the PC stick as built, loaded high: 538/538, the prompt
- make -C v4 test-32: 39 programs, 0 failures
- regressions: v3_keys, genesis on the three, stick_grow, midpull, hotplug

SAVE-BUFFERS on the 16 GiB stick: 5.1-6.1 s before, 1.1 s after; the BAM's
bytes the same (verdicts in logs/20261108-145611/verdicts/). FABRIC-3
XLVIII.14.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2

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Claude

2026-11-08 15:03:43 +00:00

parent 1354b30a78

commit 929f0e13c5

20 changed files with 1152 additions and 0 deletions

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experiments/bare_metal/runs/doe-aarch64-20261108-145102.csv

experiments/bare_metal/runs/doe-amd64-20261108-144204.csv

experiments/bare_metal/runs/doe-amd64-20261108-144500.csv

experiments/bare_metal/runs/doe-amd64-20261108-144838.csv

experiments/bare_metal/runs/doe-amd64-20261108-145611.csv

experiments/bare_metal/runs/doe-riscv64-20261108-145431.csv