Re: External USB2 HDD affects speed hda

[Rene Herman]

David Brownell wrote:

> > Hi David. Has there been any progress on this issue?
> >
> > (thread at http://marc.theaimsgroup.com/?t=111749614000002&r=1&w=2)
>
>
> Taking a look at that, I found one case that _might_ explain it.  That
> scenario could crop more (or less) based on loads and timings, and I've
> suspected that the VIA chips have significantly different timings for
> certain things.  This patch handles that case differently, just expecting
> the unlink completion code (later) to restart the schedule.
>
> I sanity tested this, but that's all.

[ snip ]

> -	if (!head->qh_next.qh) {
> +	if (!head->qh_next.qh && !ehci->reclaim) {

Thanks, but unfortunately no change. That is, still have that "Async" 
status flag toggling on and off in /sys/class/usb_host/usb?/registers 
(and the ~ 8MB/s drop in IDE throughput).

Rene.

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