Date: Wed, 25 May 2005 22:40:12 +0200 From: Palle Girgensohn <girgen@pingpong.net> To: amd64@freebsd.org Cc: Jon Kuster <kwsn@earthlink.net> Subject: Dual Xeon EM64T crashes reliably w/ 5.x amd64 Message-ID: <75f1b24e6dc7e145f7d36a874b825ab1@pingpong.net>
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Hi! 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"... :( /Palle
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