Date: Sat, 04 Nov 2000 23:00:21 -0600 From: "Lars Fredriksentory.URL_7" <lars@odin-corporation.com> To: smp@freebsd.org Subject: Resolution to SuperMicro P6DNE irq routing problems Message-ID: <3A04E965.1E6845A@odin-corporation.com>
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Hi, Over the last 8 months or so I have had nothing but trouble trying to get SMP working again with a SuperMicro P6DNE motherboard. When you booted a SMP kernel, the scsi driver would never see the interrupts from the board. This happened as soon as the second processor got enabled. Mp table was all screwy and some versions of the SMP kernel would panic due to 2 or more ISA irqs directed to the same pin. Anyway, I was just fiddling with it here last night and by telling the BIOS that FreeBSD is a Plug and Play OS, all of a sudden the mptable looks sane, the interrupts are being delivered and all is well. So for those of you that from time to time have asked about this particular motherboard and its quirckiness, you may want to try this. One thing I did notice, which I don't know if it is due to the SMPng or something else, is that everything seem to get routed to irqs less than 16. Is that purely co-incidental or what? I do see the following: Programming 24 pins in IOAPIC #0 IOAPIC #0 intpin 2 -> irq 0 IOAPIC #0 intpin 16 -> irq 11 IOAPIC #0 intpin 17 -> irq 5 IOAPIC #0 intpin 18 -> irq 15 IOAPIC #0 intpin 19 -> irq 9 Anyway, Thanks a lot to those that have tried to help me in the past with this, and to those of you working on SMPng! Great job. Lars To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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