Re: Some question about Udev

[Stanley Wang <stanley.wang@linux.co.intel.com>]

On Tue, 2003-08-05 at 00:10, Greg KH wrote:
> On Mon, Aug 04, 2003 at 09:20:15PM +0800, Stanley Wang wrote:
> > Hi Greg,
> > I have some question about Udev, please help me :)
> 
> Try asking these on the linux-hotplug-devel mailing list next time, so
> that others can see the answers for future searches.
Thanks a lot! I forget to CC linux-hotplug-devel.
> 
> > 1. How does Udev deal with the devices that can't be hot plugged ? such
> > as IDE disk, sound card.
> > If we want to use Udev to replace /dev, we must also manager these
> > devices. But these devices are probed at system boot time and will not
> > trigger the hotplug script, how could we know the existence of them ? 
> > Could we call the Udev in the init process and go through /sys to create
> > all devices' files?
> 
> udev will be called everytime /sbin/hotplug is called, and that is
> called every time we find a device during the boot process.  I'll put
> udev into the initramfs image so it too will be present during that
> time.  This way we will not miss any events.
My question: Could we boot the kernel by using udev and a empty /dev
directory?

> 
> > 2. When you talked about namedev in your slices(page 11), you mentioned
> > "tdb". What's it?
> > Quote from your slices:
> > 
> > NAMEDEV
> > [snip]
> > 
> > *able to be queried to determine current devices 
> >   *uses tdb
> 
> It's a database package called "Tiny DataBase" from the samba authors.
> 
> Hope this helps,
> 
> greg k-h
-- 
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