myxce/src/controller
Rongsong Shen bd02064ebc feat(raft-drive-async): offload requester-less config-push to slow lane (task 3.3)
push_config_transport_only spawns one thread per standby then joins them with a
CONF_PUSH_TIMEOUT_MS bounded wait — blocking the caller. On the requester-less
drive-thread paths (promotion + heartbeat convergence) that wait stalls the
io_worker. Route those through ha_config_push_offloadable, gated by
g_drive_async_configpush_offload (default OFF → inline, byte-for-byte legacy;
ON → slow lane, non-blocking).

Flag ON deep-copies the config bytes + sha into a lane ctx (caller keeps owning
and freeing its own buffer); a single cluster-wide single-flight guard
(ha_state_t.configpush_inflight scalar CAS + lane key=1) bounds it to one
config-push fan-out in flight; the in-flight flag is cleared on every terminal
path (two alloc failures, -EEXIST, hard submit error, lane completion). Send
body factored into ha_config_push_do_send.

Three requester-less drive-thread call sites converted: raft_cb_become_leader
(promotion), the HA_REPL_PUSH_CONFIG heartbeat case, and the direct-CTRL_PRIMARY
FSM promotion branch. The admin-upgrade barrier (push_config_to_standbys, has a
waiting requester) and join.c are untouched.

Lands DORMANT like tasks 3.1/3.2: the lane reads c->ha.standby_endpoints and
writes those borrowed standby endpoints, racing io_worker RDHUP teardown if run
off-thread (bug-1197 family). Flag OFF keeps push+teardown serialized on the
io_worker. Task 3.4 flips this ON together with the snapshot and peerctrl flags
after establishing endpoint-lifetime discipline.

Tests (controller suite EXIT=0): test_configpush_offload_runs_on_lane,
test_configpush_inline_when_flag_off, test_configpush_offload_dedups.
Adversarial cpp-review: no CRITICAL/HIGH/MEDIUM findings.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S6fDCtXkkEgupu7rUah1y2
2026-06-26 16:05:54 +00:00
..
include feat(raft-drive-async): LivenessAdmission pool reservation + commit fold (tasks 1.6/1.7) 2026-06-26 07:43:19 +00:00
testsuite feat(raft-drive-async): offload requester-less config-push to slow lane (task 3.3) 2026-06-26 16:05:54 +00:00
apiserver.c add kiro skills 2026-05-21 03:41:57 +00:00
CLAUDE.md fix bug-1060 bug-1067 2026-06-24 17:05:43 +08:00
cluster.c feat(raft-drive-async): peer-control vtask dispatch shim, dormant (task 3.1) 2026-06-26 11:12:04 +00:00
commit.c feat(raft-drive-async): LivenessAdmission pool reservation + commit fold (tasks 1.6/1.7) 2026-06-26 07:43:19 +00:00
config_repl.c docs(controller): NOTICE — config upgrade must snapshot state, not re-derive 2026-06-24 09:45:13 +00:00
config_repl.h fix bug-1060 bug-1067 2026-06-24 17:05:43 +08:00
ctrl_metrics.c feat: P3-7 ctrl_metrics — 7 atomic counters/gauges + descriptor table + persist wiring 2026-05-08 00:04:06 +00:00
ctrlstatus.c feat(ha-heartbeat-committed-propagation): migrate last_known_committed_config_tag to _Atomic (task 1.1) 2026-06-20 11:27:46 +00:00
dataex.c fix(persist): zero nresvals_to_sched after free_name_val_list 2026-05-20 09:39:07 +00:00
egress.c feat(ha-convergence-recovery): commit-gated scheduler egress — submit_lsn tagging + watermark gate (task 1.2) 2026-06-14 02:33:36 +00:00
ha.c feat(raft-drive-async): offload requester-less config-push to slow lane (task 3.3) 2026-06-26 16:05:54 +00:00
ha.h feat(raft-drive-async): offload requester-less config-push to slow lane (task 3.3) 2026-06-26 16:05:54 +00:00
ha_convergence.c feat(ha-term-safety): route AppendEntries intake through library + leaderCommit wire (task 3.2) 2026-06-22 08:42:35 +00:00
job.c feat(ha-convergence-recovery): commit-gated scheduler egress — submit_lsn tagging + watermark gate (task 1.2) 2026-06-14 02:33:36 +00:00
join.c feat(libxce-failover): controller populates primary host/port on E_XCE_REDIRECT replies (task 5.3) 2026-06-17 04:16:26 +00:00
main.c feat(ha-commit-durability): add --wal-sync-ms flush-cadence override (task 1.1) 2026-06-18 04:46:01 +00:00
meson.build feat(raft-drive-async): LivenessAdmission pool reservation + commit fold (tasks 1.6/1.7) 2026-06-26 07:43:19 +00:00
misc.c save works 2026-03-05 16:03:37 +08:00
myapp.c feat(ha-term-safety): out-of-band config bytes, hash-verify-before-activate, serve-fence (task 4.3) 2026-06-22 11:47:15 +00:00
myconf.c feat(ha-config-bootstrap): implement --vcpus CLI, wire validation, remove vcpus from config (task 2.2) 2026-05-28 04:17:06 +00:00
opget.c fix(persist): zero nresvals_to_sched after free_name_val_list 2026-05-20 09:39:07 +00:00
opupd.c save works 2026-03-03 16:49:26 +08:00
persist.c feat(raft-drive-async): snapshot SlowLane offload + WAL-trim cursor guard (task 3.2) 2026-06-26 15:43:24 +00:00
queue.c feat(ha-commit-barrier-rollout): commit-first-then-reply in all four handlers (task 3.2) 2026-06-12 10:28:25 +00:00
repl.c feat(ha-term-safety): retire term-0 repl_broadcast live send; carry leader term on replication (task 3.4) 2026-06-22 15:45:14 +00:00
reply.c fix(persist): zero nresvals_to_sched after free_name_val_list 2026-05-20 09:39:07 +00:00
resources.c update controller code 2025-11-05 16:58:57 +08:00
sched.c feat(ha-convergence-recovery): commit-gated scheduler egress — submit_lsn tagging + watermark gate (task 1.2) 2026-06-14 02:33:36 +00:00
slowlane.c feat(raft-drive-async): SlowLane bounded executor for long blocking I/O (task 1.2) 2026-06-26 05:24:00 +00:00
startup_validation.c feat(ha-heartbeat-liveness): add validate_heartbeat_config startup check (task 1.2) 2026-06-01 12:26:29 +00:00
task.c save works 2026-03-04 18:18:53 +08:00
worker.c feat(ha-commit-barrier-rollout): commit-first-then-reply in all four handlers (task 3.2) 2026-06-12 10:28:25 +00:00