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Date:      Tue, 4 Nov 1997 17:16:17 -0800 (PST)
From:      Alex <garbanzo@hooked.net>
To:        "John S. Dyson" <toor@dyson.iquest.net>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: More on fast make world...
Message-ID:  <Pine.BSF.3.96.971104171512.3158B-100000@zippy.dyn.ml.org>
In-Reply-To: <199711040917.EAA00368@dyson.iquest.net>

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On Tue, 4 Nov 1997, John S. Dyson wrote:

> > Silly question:  How do I do that?  Last I tried I ended in a panic...
> > How large? Where to mount?  /tmp or /var/tmp?  I foreget ...
> > 
> > Without these improvements, we are at 102 minutes end-to-end.  Let's go for
> > sub-hour make world!
> > 
> 
> This is my fstab entry.  You'll also have to add the MFS option to the kernel.
> The -s param should be smaller than your amount of swap.  To add -pipe, just
> edit your /etc/make.conf file and add -pipe to your CFLAGS entry.
> 
> swap			/tmp		mfs	rw,-s=210000,-b=16384,-f=2048 0 0

Ok, this is probably a silly question, but here it goes.  What exactly is
MFS?  Is it akin to a ramdisk?  Or is it just swap space that's emulating
a drive slice?  If it's realy out of swap space, how would that actually
improve performance?

- alex




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