Date: Wed, 11 Aug 1999 10:42:22 -0400 From: tcobb@staff.circle.net To: freebsd-stable@freebsd.org Subject: On freezes in 3.2-Stable Message-ID: <307D63ED6749CF11AAE9005004461A5B4057@FREYA>
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This is a follow-up to series of postings a few days ago about freezes in 3.2-S on a heavily loaded large memory SMP machine. The symptoms were that almost daily we'd either get a complete system freeze, with no response to network or keyboard (and no panic), or we'd get one of the processors "stuck" with a single process in the RUN state that could not be killed. There were several thoughts as to why this happened, including a discovery of an Intel Pentium III Erratum which describes the freeze symptoms exactly. After replacing the BIOS in the machine with an update to work around the problem, a freeze still occurred. The machine is: Supermicro P6DBU Dual PIII-550 w/ 512K cache 1GB ECC RAM DPT RAID controller 3COM 3C905B NIC HOWEVER, I've been able to avoid a freeze for the past 36 hours now by doing one simple thing -- removing the last 256MB ECC RAM stick out of the box, leaving it with only 768MB. The removed RAM has tested out just fine, so that leaves one of two possibilities: 1. Supermicro can't handle a full 1GB, despite their specs OR 2. FreeBSD can't handle that much memory in a stable manner There have been talks of some large memory patches floating around, but a search of the mailing lists turned up nothing. Anyone know if patching FreeBSD is required in order to support 1GB RAM? Anyone successfully running their box w/ 1GB RAM and 3.2-S? Thanks! -Troy Cobb Circle Net, Inc. http://www.circle.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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