Date: Wed, 9 Jun 1999 18:25:05 -0400 From: Richard Cownie <tich@ma.ikos.com> To: freebsd-current@freebsd.org, freebsd-smp@freebsd.org Cc: tich@ma.ikos.com Subject: 4-way SMP broken ? Message-ID: <199906092225.SAA01166@par28.ma.ikos.com>
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Hi, I've been trying to install 19990604-CURRENT on a couple of SC450NX boxes. It works fine with 2 cpu's, but an SMP kernel with 4 cpu's falls over very quickly (I think while it's setting up the APIC stuff, or very shortly after - the messages about APIC bus ids appear on the screen very briefly, then the machine reboots itself). Does anyone know a) when was the last time it worked on 4 cpu's b) what's changed recently which might relate to this. Also in trying to figure this out I looked at the DRAM probing code in /usr/src/sys/i386/i386/machdep.c:getmemsize(), and it looks as though it's not safe for >2GB (e.g. comparisons of byte addresses against signed "int end"). It would also be good if this probing code was carefule not to ventrue past 4GB-64MB (PCI device space) - then a generic kernel could work on a 4GB machine without any tweaking, which would simplify installation - I get nervous shuffling DIMMs in and out of the machine ... Thanks Richard Cownie (tich@ma.ikos.com) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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