(arena_lend::jemalloc as of this writing), by definition, are asymmetric;</span></div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="comment"> *     the borrowing side can only read, not allocate.  Hence they will map `Arena` to a different dedicated</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="comment"> *     `Shm_session` type.</span></div>
<div class="line"><a id="l00049" name="l00049"></a>