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Date: Wed, 06 Feb 2008 11:27:42 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Hugh Dickins <hugh@veritas.com>
CC: Tomasz Chmielewski <mangoo@wpkg.org>, LKML <linux-kernel@vger.kernel.org>,
       Mika Lawando <rzryyvzy@trashmail.net>
Subject: Re: What is the limit size of tmpfs /dev/shm ?
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Hugh Dickins wrote:
> 
> Don't forget that tmpfs overflows into swap, so you could save money
> by adding adding more swap and cutting down on the RAM: though of
> course that will perform very poorly once it's actually using the
> swap, probably not the direction you want to go in.
> 

It can still outperform conventional disk filesystems, however, mostly 
because it doesn't have to worry one iota about consistency.

	-hpa