md, mount_mfs and swap

[RW]

On Tue, 3 Jun 2008 17:43:27 -0400
Christopher Sean Hilton <chris at vindaloo.com> wrote:

> I've recently started playing with NetBSD and notice that by default  
> it mounts /tmp as an MFS backed by swap. A quick read of the md,  
> mount_mfs man page would lead me to believe that
> 
>       md /tmp rw,async,-s1024m 0 0
> 
> will move my /tmp dir to a swap backed 1G space. This would make me  
> feel much more comfortable about my continuing adherence to the  
> practice of giving my machine twice as much swap space as they have  
> memory.
> 
> Are there any downsides to this?
> 

Not in my experience. You can do it simply by adding the following to
rc.conf

tmpmfs="YES"
tmpsize="1024m"