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From: Ed Tomlinson <edt@aei.ca>
To: Valdis.Kletnieks@vt.edu
Cc: John Stoffel <john@stoffel.org>,
        Dan Magenheimer <dan.magenheimer@oracle.com>,
        Johannes Weiner <jweiner@redhat.com>,
        Pekka Enberg <penberg@kernel.org>, Cyclonus J <cyclonusj@gmail.com>,
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        Jeremy Fitzhardinge <jeremy@goop.org>,
        Seth Jennings <sjenning@linux.vnet.ibm.com>, ngupta@vflare.org,
        Chris Mason <chris.mason@oracle.com>, JBeulich@novell.com,
        Dave Hansen <dave@linux.vnet.ibm.com>,
        Jonathan Corbet <corbet@lwn.net>
Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window)
Date: Tue, 08 Nov 2011 07:15:04 -0500
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On Sunday 06 November 2011 17:32:54 Valdis.Kletnieks@vt.edu wrote:
> On Fri, 28 Oct 2011 16:52:28 EDT, John Stoffel said:
> > Dan> "WHY" this is such a good idea is the same as WHY it is useful to
> > Dan> add RAM to your systems. 
> >
> > So why would I use this instead of increasing the physical RAM?
> 
> You're welcome to buy me a new laptop that has a third DIMM slot. :)
> 
> There's a lot of people running hardware that already has the max amount of
> supported RAM, and who for budget or legacy-support reasons can't easily do a
> forklift upgrade to a new machine.

I've got three boxes with this problem here.  Hense my support for frontswap/cleancache.

Ed

> > if I've got a large system which cannot physically use any more
> > memory, then it might be worth my while to use TMEM to get more
> > performance out of this expensive hardware.
> 
> It's not always a large system....