If nobody minds, I've taken the liberty of reducing the distribution list 
for this thread.

On Sun, 31 Aug 2003, Duncan Sands wrote:

> > My feeling is that a reasonably large change may end up being the best
> > thing to do.  In particular, we probably only need to have one QH per
> > queue, instead of one for each URB.  But it'll be a while before that
> > stuff gets done.
> 
> But won't that result in starvation of some endpoints in favour of those
> with vast numbers of urbs queued on them?  At the moment the per-urb
> QHs mean that the hc works on only one urb per endpoint before moving
> on to the next endpoint.

I don't think that will be a problem.  So long as the TDs are marked 
"breadth-first", the HC will only work on one TD per queue (hence per 
endpoint) before moving on to the next.

Alan Stern



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