Reduce frank-default-large context for KV headroom

docs/LLM/eemin-rocmi4-mtp.md

@@ -112,9 +112,10 @@ path's greedy decisions; it does not remove the W4A4 activation approximation.
 
 ### Serving settings
 
-- 262144 context (native max), 1 slot, f16 KV, context checkpoints, prompt
-  cache. Concurrent requests queue; the server never preempts a running
-  generation.
+- 196608 context (64K below the native 262144 maximum), 1 slot, f16 KV,
+  context checkpoints, prompt cache. The lower limit leaves headroom for the
+  model plus KV cache in the host's unified-memory budget. Concurrent requests
+  queue; the server never preempts a running generation.
 - `-t 16 -tb 32`, batch 512 / ubatch 256 (the qualified W4A4 profile).
 - `--temp 0.7 --top-p 0.95`, reasoning on (`deepseek` puts `<think>` into
   `message.reasoning_content`).