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Date:      Thu, 6 Sep 2001 11:13:53 +0100
From:      Ceri <ceri@techsupport.co.uk>
To:        Andrew J Caines <A.J.Caines@halplant.com>
Cc:        freebsd-questions@FreeBSD.org
Subject:   Re: Good practice for /tmp
Message-ID:  <20010906111353.C2758@cartman.private.techsupport.co.uk>
In-Reply-To: <20010906055708.P55388@hal9000.servehttp.com>; from A.J.Caines@halplant.com on Thu, Sep 06, 2001 at 05:57:08AM -0400
References:  <craig@allmaui.com> <20010904221809.B57312B@usul.nersc.gov> <20010905183015.A824@hades.hell.gr> <20010906094931.B30676@cartman.private.techsupport.co.uk> <20010906051207.O55388@hal9000.servehttp.com> <20010906104359.E30676@cartman.private.techsupport.co.uk> <20010906055708.P55388@hal9000.servehttp.com>

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On Thu, Sep 06, 2001 at 05:57:08AM -0400, Andrew J Caines said:

	[moved from -security]

Andrew,

> > Having my swap partition mounted on a memory file system makes me
> > uncomfortable
> 
> I think it's a bit misleading to say that the "swap partition" is mounted.
> I think it more accurate to say that the storage device which backs this
> filesystem is the system's VM. The filesystem simply provides the
> semantics for the I/O.
> 
> What about this makes you uncomfortable?

Maybe I have a very naive view of the VM structure, or maybe I need more
coffee, but my brain is having a hard time here.

If you're using a lot of swap then presumably it's because you don't
have a lot of free RAM, so paging out the contents of RAM into other RAM
makes me uncomfortable, because what happens when you run out ?

Mind you, I suppose you could also run out of swap on disk as well, and
that's probably what you're saying isn't it, and I wonder how deep I can
make this hole now I've started ...

OK, I think I see your point. ;)
(although if that wasn't it then let me know please!)

Ceri

-- 
Your local RFC Nazi

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