Dual Xeon EM64T crashes reliably w/ 5.x amd64
girgen at pingpong.net
Wed May 25 13:40:15 PDT 2005
When running our Dell 2850, dual xeon CPUs, in SMP mode with 5.4 (same
w/ 5.3-stable), it will relibaly crash at least a couple of times per
day. When crashin, the kernel panics (Fatal trap 12: page fault while
in kernel mode) and the system will not reboot, neither will it save a
core dump. I need to manually hit the big button to reboot.
This machine is very loaded, mostly due to some rather sloppy php
scripts, that can be well optimized. Average load >1 most of the time,
I'd say. Still, it's not a reason to panic, IMHO :)
I've built a uni-processor kernel, and now the machine is quite stable,
but that's not a solution, of course.
I'm cc:ing Jon Kuster, since he describes exactly the same problem,
with identical hardware. His machine is not as loaded, so in his case
moving from four CPUs (two "real" + HTT) to two real (shutting down
HTT) was enough to stop the crashes. For me, I must run UP.
So, I don't get any core dumps, the machine does not reboot
automatically, and customers are really unhappy. I'm clueless and need
help. What do I do? Don't say "linux"... :(
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