pub fn decode_rollback_ring_slots(
num_ssm_layers: usize,
use_speculative: bool,
) -> DecodeRingDecisionExpand description
2026-09-25: The per-sequence ring depth, from the published depth and the
environment (decode_rollback_ring_slots_with). Preflight passes
args.speculative || args.dflash as use_speculative; the allocation must
receive the same flag, or the reserve and the ring differ.