On Tue, 29 Jul 2008, Simon Arlott wrote:

quoted text
> It doesn't appear to be possible to init multiple PCI devices at once... 
> I haven't looked into what is doing it exactly but presumably there's a 
> lock being held over the whole device probe process.
> 
> The speedup from usb seems to be primarily from initialising devices in 
> the background... perhaps there's some way to do that without doing hcd 
> init from a second thread?

You could provide useful details by booting a kernel with
CONFIG_USB_DEBUG enabled.

The USB stack _already_ initializes USB devices (i.e., not host
controllers) in a separate thread.

Alan Stern

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