linux-kernel - Re: tmpfs disabled in .config but in /proc/filesystems

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Date:	Fri, 5 Oct 2007 16:43:17 +0100 (BST)
From:	Hugh Dickins <hugh@...itas.com>
To:	Guennadi Liakhovetski <lg@...x.de>
cc:	linux-kernel@...r.kernel.org
Subject: Re: tmpfs disabled in .config but in /proc/filesystems

On Fri, 5 Oct 2007, Guennadi Liakhovetski wrote:
> Am I running crazy here (some 2.6.23-rc6-ish)?
> 
> $ zcat /proc/config.gz | grep TMPFS
> # CONFIG_TMPFS is not set
> $ grep tmpfs /proc/filesystems
> nodev   tmpfs

tmpfs (mm/shmem.c) is used by the kernel to support shared memory
of various kinds even when CONFIG_TMPFS is not set.  But only when
CONFIG_TMPFS=y can users mount a tmpfs as a fully capable filesystem.
Confusing, yes: sorry for putting the fear of craziness upon you.

Hugh
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