Re: [patch 00/13] devtmpfs patches

[Arjan van de Ven <arjan@infradead.org>]

On Sat, 9 May 2009 09:19:23 -0700
Greg KH <gregkh@suse.de> wrote:


btw... I would be a LOT happier about the solution from a technical
point of view if it wasn't the kernel making the device node, but the
kernel exposing a file with a list of all devices, so that userland can
chose to mknod or not, with which permissions if non-default and with
non-default owners.
So basically (and I'm making up a filename here, don't read too much
into that)

cat /proc/alldevices

c   1     4         foobar
b   8     0         sda
c   122   12        dri/card0

etc
making the actual nodes from this in the most simple case is basically
no time in userspace, but a slightly more advanced early userspace app
can even do permissions for the few device nodes where it matters etc.

I can imagine that being a good solution that ends up solving your
problem, but in a way that is more consistent with what the kernel does
right now and how we can then have userland make decisions on where to
make the nodes, with what perms etc etc.
In fact such a file would be a greeat help in general, and would be a
nice generic solution.



-- 
Arjan van de Ven 	Intel Open Source Technology Centre
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