This looks a whole lot like a problem I had with my PC164 system; 
totally stable until I added a Qlogic ISP1020 PCI controller to it 
($40 at WeirdStuff Warehouse!). This is a 32-bit PCI, Narrow SCSI-2 
controller. Once that was added to the system, my DEC TULIP 10/100 
Ethernet card started coughing up blood ("master abort") usually 
ending in a "corrupted pool" panic. Didn't matter whether I used the 
"de" or "tlp" driver.

What I ended up doing was changing the single-port DE500 for a 
multiport TULIP board where all four 21143's are behind a 21152 
PCI-PCI bridge. This made everything happy again. These beasties can 
usually be bought off ebay for around $100 - $120.

My guess is that the Qlogic board is doing something on the PCI bus 
that it shouldn't (or perhaps either the isp driver, or the board 
firmware is doing ...). I thinking of trading that Qlogic board out 
for an NCR 53c87x board, once I'm convinced that Manuel's "siop" 
driver is up to snuff; I'm testing now...

	Erik <fair@clock.org>