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+.\" Copyright (c) 1990 The Regents of the University of California.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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+.\"
+.\"	@(#)0.t	5.1 (Berkeley) 4/16/91
+.\"
+.rm CM
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+.ds CH "
+.ds CF "%
+.nr Fn 0 1
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+.ds Lb "Fig. \\n+(Fn
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+..
+.TL
+A Pageable Memory Based Filesystem
+.AU
+Marshall Kirk McKusick
+.AU
+Michael J. Karels
+.AU
+Keith Bostic
+.AI
+Computer Systems Research Group
+Computer Science Division
+Department of Electrical Engineering and Computer Science
+University of California, Berkeley
+Berkeley, California  94720
+.sp
+email: mckusick@cs.Berkeley.EDU
+telephone: 415-642-4948
+.AB
+This paper describes the motivations for memory-based filesystems.
+It compares techniques used to implement them and
+describes the drawbacks of using dedicated memory to
+support such filesystems.
+To avoid the drawbacks of using dedicated memory,
+it discusses building a simple memory-based
+filesystem in pageable memory.
+It details the performance characteristics of this filesystem
+and concludes with areas for future work.
+.AE
+.LP