[tulip] device or resource busy

[Donald Becker]

On Fri, 17 Nov 2000, Dan Hollis wrote:

> 5 out of 10 of our servers experienced tx lockup problems with the ADMtek
> Centaur.
> 
> > My current theory is that the FIFO underrun is a symptom of a prior
> > problem, and bumping up the threshold register is unrelated.
> 
> Enabling CSR18 bit 1 *eliminates* the tx lockup problem on *all* of our
> servers. Just a data point.
> 
> Did you read the message from Bill Paul about ADMtek hardware flaws he ran
> into while writing the FreeBSD driver?

Yes, but my reaction was that his problems were all tied to packets spanning
multiple descriptors due to using mbufs.  Our linear skbuffs avoid many
problem sources.

Donald Becker				becker@scyld.com
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993