Not yet accepted. bam_flush_to_disk() and bam_sync_from_disk() read and
wrote every page of the BAM; with the stick's BAM sized for 256 GiB (6144
devblocks, 24 MiB) every flush of a dirty block moved 24 MiB each way.
They now touch only the pages that hold the slot's bits -- its reserved
bits and one per user block (bam_pages_used()) -- the pages past them are
never set, so the bytes on disk are the same.
Test (qemu_session.py bam_flush, --target qemu-stick --stick-gib 16):
three SAVE-BUFFERS of an Artemis block, each timed, then the BAM hashed.
Before: 5.1 / 5.6 / 6.1 s (the 2 s limit fails; it was set after seeing
this baseline). After: 1.1 / 1.1 / 1.1 s. The BAM's bytes the same either
way: sha256 79197a40...b9e44b50, 5 non-zero bytes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Task 3 of plan 2026-10-29-stick-5, accepted in full:
- amd64, aarch64, riscv64: the proxy Zuse minted on a fresh data stick,
PARITY:V4_POST tests=538 pass=538 fail=0, POST: PASSED, [zuse@Hera] ok>;
dict_hash 0xfec8c47cfc6f437f on the three
- the PC stick as built, loaded high (stick_genesis): 538/538, the prompt
- make -C v4 test-32: 39 programs, 0 failures
Regressions pass. v3_keys failed once (a virtio_blk request never completed,
logs/20261108-132844) and passed on its rerun (logs/20261108-141539).
The plan's Task 3 steps ticked; FABRIC-3 XLVIII.13.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
system=v3: Hestia logged 'virtio_blk: request never completed'; Hera reached the Zuse drive's attach and no further. Task 1's v3_keys (logs/20261108-043612) has no such line and passed. The drives were the same three, passed explicitly. To be rerun; bisected against Task 1 if it fails again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Not yet accepted (plan 2026-10-29-stick-5, Task 3).
- kernel/Makefile: a v4 `qemu` boot attaches a fresh data stick
(DATASTICK=1) and nothing else; ARTDISK/ZUSEDISK keep the minted pair only
for system=v3 (QEMU_V3_BOOT, from KERNEL_ARGS).
- qemu_session.py: the Makefile's defaults for every mode but those that ask
for the pair by name (stick_artemis, two_sticks, artemis_unsigned,
raw_ident, v3_keys) or for no drive; `zuse` now expects the genesis line.
- nightly.sh: accept stick-high runs stick_genesis (the stick as built).
- .claude/CLAUDE.md "The disks", the stick-high line; disk/README.md (the
pair: tests and v3 only); STICK.md 11, increments 3 and 5 done.
Before the change: zuse on amd64 FAIL -- the pair's "identity confirmed",
no genesis line (logs/20261108-130732).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Task 2 of plan 2026-10-29-stick-5, accepted in full:
- amd64, aarch64, riscv64: PARITY:V4_POST tests=538 pass=538 fail=0,
POST: PASSED, [zuse@Hera] ok>; dict_hash 0xfec8c47cfc6f437f on the three
- the PC stick loaded high: 538/538, POST: PASSED, the prompt
- make -C v4 test-32: 39 programs, 0 failures
The acceptance boots' logs, the accept-*.txt verdicts and test-32's output
(logs/20261108-123847/verdicts/). The plan's Task 2 steps ticked; FABRIC-3
XLVIII.9, with one item for a ruling: blk_flush rewrites the whole BAM, now
sized for 256 GiB.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Not yet accepted (plan 2026-10-29-stick-5, Task 2, step 3).
- gpt.c: the writer, gpt_grow_last() -- the backup entry array and header to
the disk's end, the last partition to the last usable sector (whole MiB,
capped), both headers' CRCs, the backup before the primary, the
protective MBR's size; gpt_alternate_lba().
- sk_v4_grow.c: the volume grown to its partition -- its fence (the Artemis
signature, Zuse's genesis marker) moved to the new top, the header last;
the partition grown no further than the BAM tracks (the block subsystem
places the fence by the device's size, so a volume must fill it).
- sk_v4_identity.c: a stick of 8 GB or more whose GPT ends short of the disk
is grown before its partitions are opened; "Artemis: grown to fill the
stick" / "under 8 GB -- not grown" / "past 256 GiB ... left unused".
- block_subsystem: blk_volume_compute_totals() (compute_totals_from_B,
public) and blk_subsys_set_format_bam_for(); v3's behaviour unchanged.
- mkartemis --bam-for, mkdiskimage.sh --bam-for, kernel/Makefile
STICK_GROW_MIN_BYTES / STICK_ARTEMIS_CAP_GIB: the stick's and data stick's
Artemis BAM sized for 256 GiB (6144 devblocks). STICK.md 5a: 256 GiB (R1).
After: stick_grow PASS (16 GiB: 12129370 user blocks, 8 s POST to prompt;
second boot not grown, recognised; sfdisk --verify: no errors), stick_small
PASS, check_images.sh PASS.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Plan 2026-10-29-stick-5, Task 2, steps 1-2:
- qemu_session.py: --stick-gib N (the session's copy of the stick extended,
sparse); modes stick_grow (16 GiB: grown, over 12000000 user blocks, the
prompt, the first boot's time; the second boot of the same copy not grown
again; sfdisk --verify clean) and stick_small (4 GiB: under 8 GB, not grown,
said so).
- kernel/Makefile: STICK_GIB and STICK_FRESH on qemu-stick, for those.
- check_images.sh: the PC stick's and data stick's Artemis BAM sized for the
256 GiB cap (6144 devblocks).
Before the change: stick_grow FAIL (no growth line, 1137649 user blocks,
sfdisk: the backup GPT not at the end); stick_small FAIL (no line);
check_images.sh FAIL on the two BAM checks only.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Task 1 of plan 2026-10-29-stick-5, accepted in full:
- amd64, aarch64, riscv64: PARITY:V4_POST tests=538 pass=538 fail=0,
POST: PASSED, [zuse@Hera] ok>; dict_hash 0xfec8c47cfc6f437f on the three
- the PC stick loaded high: 538/538, POST: PASSED, the prompt
- make -C v4 test-32: 39 programs, 0 failures
The logs of the acceptance boots (aarch64 044253, riscv64 044558, the stick
high 044725; amd64 044115 is already in), the four accept-*.txt verdicts and
test-32's output. The plan's Task 1 steps ticked; FABRIC-3 XLVIII.8.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GE3SDvQn5EoxdGufk84zz2
Claude