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+[[!meta copyright="Copyright © 2011, 2013 Free Software Foundation, Inc."]]
+
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts.  A copy of the license
+is included in the section entitled [[GNU Free Documentation
+License|/fdl]]."]]"""]]
+
+[[!tag open_issue_gnumach]]
+
+IRC, freenode, #hurd, 2011-05-07
+
+    <braunr> and as a last example: memory mapping is heavily used in the hurd,
+      but for some reason, the map entries in an address space are still on a
+      linked list
+    <braunr> a bare linked list
+    <braunr> which makes faults and page cache lookups even slower
+
+A [[red-black tree|gnumach_vm_map_red-black_trees]] was added to VM maps to
+speed up lookups.