From db17ae5c27c614731b849cc4acc6a2857060c771 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Wed, 23 Jul 2014 01:25:01 +0200
Subject: system: Add /dev/shm.

* gnu/system/file-systems.scm (%shared-memory-file-system): New
  variable.
  (%base-file-systems): Add it.
* doc/guix.texi (File Systems): Document it.
---
 doc/guix.texi | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'doc')

diff --git a/doc/guix.texi b/doc/guix.texi
index 42e62d4648..7bc10dc566 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -3084,6 +3084,12 @@ Manual}).  Pseudo-terminals are used by terminal emulators such as
 @command{xterm}.
 @end defvr
 
+@defvr {Scheme Variable} %shared-memory-file-system
+This file system is mounted as @file{/dev/shm} and is used to support
+memory sharing across processes (@pxref{Memory-mapped I/O,
+@code{shm_open},, libc, The GNU C Library Reference Manual}).
+@end defvr
+
 @defvr {Scheme Variable} %binary-format-file-system
 The @code{binfmt_misc} file system, which allows handling of arbitrary
 executable file types to be delegated to user space.  This requires the
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