admin
e70b5feebe
Completes the spike once the venue came back. Q4's hang case and teardown are now measurements, not plans. Against a dmsetup-suspended device (I/O queues instead of returning EIO): - P1 (devno compare) and P2 (ext4 abort flags) completed in 364us / 206us. They read /proc, so no block device is involved. - statfs and getdents completed and reported HEALTHY — on a wedged device they do not even hang. R-117b confirmed in a second failure mode. - EVERY probe that touches the device blocked, including a buffered write with no fsync: the O_CREAT metadata path needs journal access (wchan=do_get_write_access). There is no cheap-and-safe write probe. - The blocked process survived SIGTERM AND SIGKILL (stat=D, wchan=folio_wait_bit_common, still alive 3m50s after kill -9) and died only when the device was resumed. So `systemctl restart felhom-agent` would hang, leaving the agent unrecoverable until the device returns or the host reboots. The thread count does not reveal the leak (5->5, 5->6). Filed as R-117f. A timeout protects the caller's control flow and nothing else, so "the fix must issue no block I/O" is now a fence rather than a preference — the thread-leak hypothesis the probes were built to test turned out to be the weaker half of the result. Teardown done, all three layers: guest 9301 destroyed, r117scratch removed, both dm and both loop devices gone, scsi_debug unloaded, local back to 37.02% against a 37.00% session start. Fences re-verified AFTER teardown: 9201 running, drill-r50 stopped, local-lvm 38.84% byte-identical, felhom-backup content unchanged, live /mnt/felhom-drives intact with both submounts, agent active. Layer 3 genuinely empty — 9301 had no NIC and ran no controller. Trap recorded: a suspended dm device must be resumed BEFORE any umount, or the teardown blocks on the same uninterruptible sleep.
documentation/backlog/
OPEN-ITEMS.md is the register of open work and the file to read first — it holds only what is
open, one row per item, every row with a state and an owner. ROADMAP.md is the full history and
reasoning behind the R-n IDs, including shipped and killed items; an ID is minted there, and a new
instance of an existing item attaches to that ID rather than getting its own.
The rest of this folder: verified-LIVE findings with implementable fix plans that are not yet
implemented. Preserved here
(instead of on git branches) per the trunk-based, no-branches rule — the fix itself is implemented later
directly on main, during a normal/supervised session.
-
FIX-M18-NOTES.md — dump re-validation runs every 5 min (perf). FIXED in controller v0.62.0 @
f8afe5c(2026-06-14). (was on the deletedfelhom-controllerbranchfix/m18-dump-validation-cache.) -
FIX-M19-NOTES.md —
deriveStackNamemisattribution edge (low-incidence correctness). FIXED in controller v0.62.0 @6bab68b(2026-06-14). (was on the deleted branchfix/m19-stackname-crossref.) -
FOLLOWUP-golden-default-controller-tag.md — the golden bakes a stale controller (
:0.43.0when queued; had rotted again to:0.85.1by resolution). FIXED in felhom-agent @ceca355(2026-07-03):build-golden.shv2.0.0 makes the controller tag a MANDATORY argument (a required arg cannot rot) and golden 0.98.3 was baked + clean-room-validated (bake → first-boot-current → self-manage → app deploy, on the drill VM — no supervised touch of live guests needed) + published + vouched. Evidence:../audits/DRILL-golden-098-2026-07-03.md.
Related: the live-drive fixspec (../audits/live-drive-fixspec-2026-06-14.md) carries the deferred
supervised items F9 (HDD provisioning/guest-attach), F20-BUG2 (durable_id scheme), F20-BUG3 (async
mkfs) — to be implemented in the agent/golden supervised session.