NOTICE:  RegisterSharedInvalid: SI buffer overflow
NOTICE:  InvalidateSharedInvalid: cache state reset
NOTICE:  RegisterSharedInvalid: SI buffer overflow
NOTICE:  InvalidateSharedInvalid: cache state reset
NOTICE:  RegisterSharedInvalid: SI buffer overflow
NOTICE:  InvalidateSharedInvalid: cache state reset

A note on one of the mailing lists indicates that this can happen if someone has an open transaction. In my case bouncing tomcat did the trick.

The pass-through device for GPM is /dev/gpmdata.

The Tulip network driver 0.92 on my Gateway box would stop working, usually when I was sending a large block of data. It would put this in the log:

Jun  4 19:30:29 tobypc kernel: eth0: Transmit timed out, status fc664010, CSR12 00000000, resetting...
Jun  4 19:31:04 tobypc last message repeated 7 times

Upgrading to version 0.92t seems to have fixed things.