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From: dillon@best.com (Matt Dillon)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Suggestion for 3.0 :-)
Date: 13 Jun 1995 21:40:53 -0701
Organization: Best Internet Communications, Inc. (info@best.com)
Lines: 34
Distribution: best
Message-ID: <3rlp96$hu6@shell1.best.com>
References: <3r7p9i$2ko@news.bu.edu> <JUN.95Jun13132032@fox.fax.iwa.fujixerox.co.jp>
NNTP-Posting-Host: shell1.best.com
:In article <JUN.95Jun13132032@fox.fax.iwa.fujixerox.co.jp>,
:Junichi Kurokawa <jun@fox.fax.iwa.fujixerox.co.jp> wrote:
:>>>>>> "M" == Mikhail Teterin <mi@cs.bu.edu> writes:
:>
:> M> How about using all (or a chunk) of Windows swap file space as an
:> M> additional swap space? I believe many of FreeBSD users also have
:> M> MS Windows installed.
:>
:>Plain-file swap as opposed to a dedicated swap pttn will be even better.
:>
:># any possibility for performance drawback?
:>
:>--
:>Junichi Kurokawa
:>Enterprise Networking Development Division
:>Fuji Xerox Co., Ltd.
So far pretty serious performance drawbacks have been found swapping
to files rather then partitions. Both NeXT and Linux have had a
terrible time of it (from personal experience). I don't know about
Solaris.
Even with the ability to swap to a plain file, I would not recommend it
for general swap. Backing store via mmap(), yes. General swap space, no.
Speaking of which: what's the official word on writable shared mmap() ?
Is it stable in 2.0.5R or does it need more work?
-Matt
--
Matthew Dillon VP Engineering, BEST Internet Communications, Inc.
<dillon@best.com>, <dillon@apollo.west.oic.com>
[always include a portion of the original email in any response!]