linux-kernel - Re: [PATCH] driver-core: devtmpfs - driver core maintained /dev tmpfs

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Message-ID: <20090502215434.GB17622@kroah.com>
Date:	Sat, 2 May 2009 14:54:34 -0700
From:	Greg KH <greg@...ah.com>
To:	Alan Jenkins <sourcejedi.lkml@...glemail.com>
Cc:	Kay Sievers <kay.sievers@...y.org>,
	Christoph Hellwig <hch@...radead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Jan Blunck <jblunck@...e.de>, linux-arch@...r.kernel.org,
	viro@...iv.linux.org.uk, torvalds@...l.org, akpm@...l.org,
	adam@...drasil.com
Subject: Re: [PATCH] driver-core: devtmpfs - driver core maintained /dev
	tmpfs

On Sat, May 02, 2009 at 10:41:50PM +0100, Alan Jenkins wrote:
> 
> But is read-only so bad?  You just have to copy it over to a tmpfs and
> then mount that on top of /dev.  That's atomic, so it won't interfere
> with parallel early init.

The copy would not be atomic.

> I sympathize, devtmpfs is a really neat hack that does exactly what
> udev needs.  But you have to admit, it doesn't fit in _quite_ as well
> with the kernel status quo.

I disagree, it mirrors exactly what we are doing today from userspace,
which is quite the "status quo" in that distros have been doing that for
years now :)

thanks,

greg k-h
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