linux-kernel - Re: What is the limit size of tmpfs /dev/shm ?

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Message-ID: <47AA0A2E.30701@zytor.com>
Date:	Wed, 06 Feb 2008 11:27:42 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Hugh Dickins <hugh@...itas.com>
CC:	Tomasz Chmielewski <mangoo@...g.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Mika Lawando <rzryyvzy@...shmail.net>
Subject: Re: What is the limit size of tmpfs /dev/shm ?

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
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