Bring the stutter map's ini text, the checks in docs/building.md and the released-textures bound line in step with the code.

- nx2navi.ini.example said the stutter map is written every 10 minutes and at exit; since 7b0dbeb1 it is every 5
  minutes of play (stutter_map.c SM_REPORT_NS), at a focus loss in play and at exit, and since 2f640fb8 a run of
  consecutive long frames counts as one hitch with their summed time. The paragraph now says both.
- docs/building.md had no paragraph for tests/freeze_hold_check.py (0e0cfe08), while each other header-alone check has
  one: it now says what a change to runtime/freeze_hold.h or vk_memory.c freeze_pass must pass and what it checks.
- vk_texture.c released_cap_bytes named "a thirty-second of the installed memory" as the source of the bound even when
  plat_mem_info gave no size and the bound fell back to 1024 MiB; that case now reads "the default without the
  installed memory's size".

Text only. check_content passes; freeze_hold_check passes; vk_texture.c compiles with the dev flags and with -Wall
-Wextra with the one warning it had before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/building.md

@@ -652,6 +652,12 @@ A change to where the lazy write-back is on by default (`runtime/wb_lazy_choice.
 `vk_mem_lazy_decide`) passes `python tests\wb_lazy_check.py`, which builds the header alone and checks the choice and
 its reason by platform, by GPU driver and by what the player set. No game files, no GPU.
 
+A change to when the freezing of idle guest regions waits (`runtime/freeze_hold.h`, `runtime/vk_memory.c`
+`freeze_pass`) passes `python tests\freeze_hold_check.py`, which builds the header alone: the backoff after a slow
+freeze doubles while slow ones come within the quiet time, fast freezes between them included, stops at its cap and
+starts over after the quiet time (with a quiet time of 0, at the first fast freeze); and an area load holds the passes
+while the texture pool loads and for the hold after it or after the area's load. No GPU, no game files.
+
 A change to what writes `nx2navi.ini` outside the game (`launcher/gameini.py`, `installer/ini.py`, `tools/make_game.py`,
 `launcher/updater.py`) passes the settings-file tests of `tests\launcher_test.py` (`PlayerIniTest`, and the tests named
 `..._settings_file` of `BackgroundUpdateTest` and `MakeGameTest`): a player's file with lines that are no settings of

nx2navi.ini.example

@@ -1039,9 +1039,10 @@
 # flight_flash_diff = 24
 # flight_flash_cells = 3
 # Stutter map: the log gets a line for each hitch (a frame over 2.5 times the frames before it and at least 12 ms, or
-# over 25 ms) with the area, what the frame waited for and the pipelines and shaders its draws met missing, and every 10
-# minutes and at exit a map of the areas by their hitches and of the pipelines that cost the most. tools/stutter_map.py
-# reads it. 0: off. Read at start.
+# over 25 ms) with the area, what the frame waited for and the pipelines and shaders its draws met missing; a run of
+# consecutive long frames counts as one hitch with their summed time. Every 5 minutes of play, when the window loses
+# the focus in play and at exit, a map of the areas by their hitches and of the pipelines that cost the most.
+# tools/stutter_map.py reads it. 0: off. Read at start.
 # stutter_map = 0
 # GPU pass marks: after a GPU crash (device lost) the log names the render pass or dispatch the GPU had started and the
 # last one it finished. Unset: on AMD GPUs (VK_AMD_buffer_marker). 1: also on NVIDIA GPUs

runtime/vk_texture.c

@@ -2547,7 +2547,8 @@ static uint64_t released_cap_bytes(void) {
             plat_mem_info(&used, &total, &proc);
             mb = total > 0 ? (long long)(total / 32) : 1024;
             mb = mb < 512 ? 512 : mb > 2048 ? 2048 : mb;
-            by = ", a thirty-second of the installed memory (512 MiB to 2 GiB)";
+            by = total > 0 ? ", a thirty-second of the installed memory (512 MiB to 2 GiB)"
+                           : ", the default without the installed memory's size";
             // By the card too: a quarter of its budget where the PC has an eighth of its memory to match, up to
             // RELEASED_CAP_MAX_MB. The game lets go of the textures of what leaves the view and takes them back when
             // it returns; walking through a village the released ones passed 1 GiB within two or three minutes, and