[realtek] Question: Rx Ring Buffers in the rtl8139 module

Donald Becker becker@scyld.com
Fri Aug 30 15:16:10 2002

On Fri, 30 Aug 2002 joerg.beyer@email.de wrote:

> Aug 31 20:51:14 wally kernel: eth0: Abnormal interrupt, status 00000040.
> do you see anything from this?

Yes, you have a major problem with PCI bus bandwidth.  The received
packets cannot be moved from the NIC to main memory quickly enough.

Perhaps your laptop is slowing down the PCI bus to save power, based on
a lack of keyboard activity.  Or perhaps the PCI parameters are set so
that PCI bursts do not occur.

If the latter, you are in one of the few situation where the PCI bus
settings will have to be tuned.

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