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[//]: # ([[meta copyright="Copyright © 2007, 2008, 2010, 2012 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]]."]]"""]]

[[!meta title="Mach"]]

Mach is a so-called first generation [[microkernel]]. Originally developed by Carnegie Mellon University (CMU) from 1985 to 1994, which was then forked and carried from 1996 onward by GNU. It is the
microkernel currently used by the [[Hurd]].

  * [[Concepts]]
      * [[Deficiencies]]
  * [[Documentation]]
  * [[History]]
      * [Torvalds, Tanenbaum
        Debate](http://choices.cs.illinois.edu/cache/Linus_vs_Tanenbaum.html)


# Implementations

  * [[GNU_Mach|gnumach]]
  * [Apple's XNU (Darwin)](https://github.com/apple-oss-distributions/xnu) (**non-free**)
  * [[open_issues/OSF_Mach]]


# Related

  * [[Mach_Interface_Generator_(MIG)|mig]]


[[!ymlfront data="""

kernel_foundation_unix:

  "M. Accetta, R. Baron, W. Bolosky, D. Golub, R. Rashid, A. Tevanian, and
  M. Young, Mach: A New Kernel Foundation for UNIX Development, USENIX
  Conference Proceedings, July 1986.  Paper
  [\[pdf\]](http://www.cs.toronto.edu/~demke/469F.06/Handouts/mach_usenix86.pdf)."

kernel_interface:

  "Mach 3 Kernel Interfaces.  Open Software Foundation and Carnegie Mellon
  University.  Keith Loepere, Editor.  NORMA-MK12: July 15, 1992.  Book [\[ps
  (HTTP)\]](http://www.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/kernel_interface.ps),
  [\[ps
  (FTP)\]](ftp://ftp.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/kernel_interface.ps)."

kernel_principles:

  "Mach 3 Kernel Principles.  Open Software Foundation and Carnegie Mellon
  University.  Keith Loepere.  NORMA-MK12: July 15, 1992.  Book [\[ps
  (HTTP)\]](http://www.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/kernel_principles.ps),
  [\[ps
  (FTP)\]](ftp://ftp.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/kernel_principles.ps)."

server_interface:

  "Mach 3 Server Writer’s Interfaces.  Open Software Foundation and Carnegie
  Mellon University.  Keith Loepere, Editor.  NORMA-MK12, user15: July 15,
  1992.  Book [\[ps
  (HTTP)\]](http://www.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/server_interface.ps),
  [\[ps
  (FTP)\]](ftp://ftp.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/server_interface.ps)."

server_writer:

  "Mach 3 Server Writer’s Guide.  Open Software Foundation and Carnegie Mellon
  University.  Keith Loepere, Editor.  NORMA-MK12, user15: July 15, 1992.  Book
  [\[ps
  (HTTP)\]](http://www.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/server_writer.ps),
  [\[ps
  (FTP)\]](ftp://ftp.cs.cmu.edu/afs/cs/project/mach/public/doc/osf/server_writer.ps)."

vm:

  "R. Rashid, A. Tevanian, M. Young, D. Golub, and R. Baron,
  Machine-Independent Virtual Memory Management for Paged Uniprocessor and
  Multiprocessor Architectures, 2nd ACM Symposium on Architectural Support for
  Programming Languages and Operating Systems (ASPLOS), October 1987.  Paper
  [\[pdf\]](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.111.7918&rep=rep1&type=pdf),
  presentation
  [\[ppt\]](http://www2.cs.uh.edu/~paris/6360/PowerPoint/Mach.ppt)."

"""]]