Greg KH wrote:
> On Mon, Oct 14, 2002 at 10:46:31AM -0700, David Brownell wrote:
> 
>>The question related to architecture is whether there needs to be
>>another reservation mode, where usb's reserved bandwidth would be
>>allocated in preparation for future use (not just for current use).
> 
> 
> I really hate to ask, but what does Windows do for USB bandwidth
> reservation?  Anyone know?

I asked around a bit, and it seems my original understanding was
correct:  they allocate on the SET_INTERFACE call that choses an
altsetting that has periodic endpoint.

This is basically an early-vs-late binding policy choice.  MSFT is
doing early binding, Linux is doing late.  Which is fine with me;
the rule of thumb I'm used to is that late binding is preferable
until there's a real problem with not having an "early" option.
If you delay binding late enough, you may never need to assign the
resources!  :)

- Dave





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