linux-kernel - Re: [PATCH] Make sysctl a separate filesystem

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Date:	Fri, 15 Feb 2008 18:18:15 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Randy Dunlap <randy.dunlap@...cle.com>
cc:	Mikael Pettersson <mikpe@...uu.se>,
	Andi Kleen <andi@...stfloor.org>,
	Pavel Emelyanov <xemul@...nvz.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Alexey Dobriyan <adobriyan@...nvz.org>
Subject: Re: [PATCH] Make sysctl a separate filesystem


On Feb 15 2008 08:34, Randy Dunlap wrote:
>> >
>> >Doing it automatically is the only acceptable way, IMO.
>> 
>> For time being only.
>> 
>> The kernel (currently) only auto-mounts invisible filesystems.
>
>like /root, sysfs, futexfs, pipefs, anon_inodefs, bdev, devpts,
>hugetlbfs, inotifyfs ?

Yes?

/ (double case - initramfs or kernel), sysfs, devpts and
hugetlbfs can be mounted using mount(8) (or mount(2)), so
userspace can - and distro scripts do just that - mount them.

futexfs, pipefs, anon_inodefs, bdev and inotifyfs are 'invisible'
filesystems in that you cannot mount them yourself and that you
do not usually get to see them except probably when readlink(2)ing
on /proc/X/fd/N.
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