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	microkernel/mach/external_pager_mechanism.mdwn

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+[[!meta copyright="Copyright © 2010 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]]."]]"""]]
+
+The GNU Hurd has a lot of [[advantages]], but there are challenges, too.
+
+Some of these are explained in the [[hurd/critique]].
+
+Even though they're quite popular in the simpler embedded space, there is no
+successful true multi-server [[microkernel]] system for general-purpose desktop
+use yet.  This is still an ongoing research effort.  (TODO: add references.)
+
+Likewise, resource scheduling in distributed operating system kernels is a
+research topic.  For example, read more about it on the relevant [[Open Issues
+page|open_issues/multiprocessing]].  Also, the [[microkernel/Viengoos]]
+research kernel project strives to explore these.
+
+TODO: more to come.  [[!tag open_issue_documentation]]