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Offloaded work used two different mechanisms: a per-loop isc_helper thread for CPU-bound crypto (DNSSEC validation, message signature checks) and the process-global libuv thread pool for blocking I/O (zone load and dump, inbound transfer apply). Neither could cancel a queued task, and the two disagreed about exclusive mode — the helper paused with its loop under isc_loopmgr_pause() but the libuv pool did not, so blocking offloaded work kept running while a loop held the exclusive lock. Unify both behind isc_work: each loop gets its own worker thread per lane — FAST for short, bounded tasks and SLOW for long, blocking ones — fed by a private queue. Separate lanes keep a short crypto task off the path of a multi-second zone dump once both run on per-loop workers; every lane parks with isc_loopmgr_pause() so exclusive mode now quiesces offloaded work too; and a still-queued task can be canceled before it starts (isc_work_cancel). isc_helper is removed and its callers select a lane. |
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| .. | ||
| bench | ||
| dns | ||
| include/tests | ||
| isc | ||
| isccfg | ||
| libtest | ||
| ns | ||
| .gitignore | ||
| meson.build | ||