linux-kernel - Re: [PATCH] Remove broken by design and by implementation devtmpfs maintenance disaster

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Date:	Thu, 17 Sep 2009 14:13:03 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Kay Sievers <kay.sievers@...y.org>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Greg Kroah-Hartmann <greg@...ah.com>
Subject: Re: [PATCH] Remove broken by design and by implementation devtmpfs
  maintenance disaster

> >  * A static dev is faster.
> 
> A static /dev is unreliable and unpredictable, and can not be used in
> any not very limited and controlled environment. It's pure theory for

Moblin appears to be the fastest boot and doesn't use it. I fact Arjan
seems pretty anti

> Eric, ever wondered why all the people working in hotplug area,
> maintaining todays systems, and even the ones who wrote udev, want
> this? And only people who have never written any code in hotplug land

"All". Thats a bit of a fiction.


But this is the wrong argument anyway

The question is
- Is it technically correct
- Does it properly interact with the rest of the kernel and upcoming stuff

So I'd like to see the fs folks sign off on it - which they've noticably
not done yet.

Whether you want devfs2 (ie devtmpfs) or static dev or udev is a
configuration and user dependant question no different to what fs do you
prefer. Whether it actually works and doesn't screw stuff up is a rather
more important technical question that needs proper review from the fs
list, which is notably lacking right now, except in the negative.
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