The heartbeat with the fast path. Measured, 2026-10-22
Until this, the host could not tell a coprocessor that stopped forwarding from one with nothing to forward. The vendor's own host sends its fast path a heartbeat message every five seconds and waits for it to be answered with the same sequence number; this driver counted both message types and sent neither (the discovery, 680).
The whole page, with how it was taken and what it does not show: The heartbeat with the fast path. Measured, 2026-10-22.
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