Re: PATCH: Multiprobe sanitizer

[Greg KH <greg@kroah.com>]

On Thu, Aug 17, 2006 at 04:43:29PM +0200, Olaf Hering wrote:
> On Thu, Aug 17, 2006 at 05:22:44AM -0700, Greg KH wrote:
> > On Thu, Aug 17, 2006 at 02:12:57PM +0200, Benjamin Herrenschmidt wrote:
> > > On Thu, 2006-08-17 at 05:00 -0700, Greg KH wrote:
> > > > On Thu, Aug 17, 2006 at 11:24:35AM +0200, Benjamin Herrenschmidt wrote:
> > > > > Probe ordering is fragile and completely defeated with busses that are
> > > > > already probed asynchronously (like USB or firewire), and things can
> > > > > only get worse. Thus we need to look for generic solutions, the trick of
> > > > > maintaining probe ordering will work around problems today but we'll
> > > > > still hit the wall in an increasing number of cases in the future.
> > > > 
> > > > That's exactly why udev was created :)
> > > > 
> > > > It can handle bus ordering issues already today just fine, and distros
> > > > use it this way in shipping, "enterprise ready" products.
> > > 
> > > Only up to a certain point and for certain drivers... but yeah. 
> > 
> > What drivers are not supported by this?  Seriously, have we missed any?
> 
> Do serial drivers have a device symlink now

Yes:
 $ tree /sys/class/tty/ttyS0
/sys/class/tty/ttyS0
|-- dev
|-- device -> ../../../devices/platform/serial8250
|-- subsystem -> ../../../class/tty
`-- uevent

> and video drivers?

Properly written ones do, I have heard reports that some do not, but
that's a driver bug that should be fixed with a one line addition.  If
you know of any specific ones, please let me know and I'll make the
needed change.

thanks,

greg k-h