From owner-freebsd-current  Sat Jan 13 20: 2: 8 2001
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Date: Sat, 13 Jan 2001 23:01:41 -0500 (EST)
From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
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To: Matthew Thyer <thyerm@camtech.net.au>
Cc: Sheldon Hearn <sheldonh@uunet.co.za>,
	Edwin Culp <eculp@encontacto.net>, current@FreeBSD.ORG
Subject: Re: /boot/kernel/kernel: swap_pager_getswapspace: failed
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<<On Sat, 13 Jan 2001 01:46:46 +1030, Matthew Thyer <thyerm@camtech.net.au> said:

> No I want mfs to grow and shrink its filesystem dynamically.

MFS has never done so.  MFS is simply a UFS which uses (swap-backed)
memory instead of a physical disk; it relies on the filesystem to
avoid touching blocks that it doesn't need, and on the VM system to
avoid wasting memory on allocated-but-untouched address space.
Historically, MFS would waste time copying disk blocks twice on their
way to the user, but I think this may have been fixed by Matt Dillon.

-GAWollman



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