rk done in advance"
    counter of the GC smoothing system. The unit is one millionth of a
    full GC.<br>
<b>Since</b> 4.03.0<br>
</div>

<pre><span id="VALhuge_fallback_count"><span class="keyword">val</span> huge_fallback_count</span> : <code class="type">unit -&gt; int</code></pre><div class="info ">
Return the number of times we tried to map huge pages and had to fall
    back to small pages. This is always 0 if <code class="code"><span class="constructor">OCAMLRUNPARAM</span></code> contains <code cl