To my previous comments I should add that, to my knowledge, not every AMD CPU model suffers the problem in question. Dennis Allison at 15:10 (UTC-0800) on Mon, 9 Dec 2002 said: = I have been running a dual processor AMD Athlon server with a 760-based = Tyan motherboard, 2GB memory, 100GB disk, Redhat Linux 7.3 without problem. = I've watched for but have not seen any problems with the global interpreter = loc. The workload seems to distribute over the processors without any problems. = = Uptime is currently a something like 5 months. We support several thousand = users using Zope. = = The original installation of RH7.3 was painful because interrupts were being = directed to the wrong processor on intial load. Getting the intial load = required the use of the magical, undocumented flag '-isys' at load-boot = time. =