Date: Fri, 22 Jun 2001 16:45:13 -0400 From: John LoVerso <loverso@infolibria.com> To: Eric Parusel <lists@globalrelay.net> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: SMP/fxp problem... Message-ID: <3B33AE59.A2D28EEE@infolibria.com> References: <200106221638.MAA35061@www.cmass.org> <009a01c0fb5a$5e1189d0$0600020a@frontend>
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> When you say "changing a BIOS settings that limited the number of IRQ > assignments from a legacy mode", did you mean that you increased the > limit of IRQ assignments from a legacy mode, or decreased the limit? > (I think you mean increased, but I'd like to be 100% sure :) ) Increase. In December I spent a small amount of time tracking down this problem (I added a trace buffer to see if I could pinpoint the interrupt load at the time I'd get a "device timeout"). Somewhere I got a hint about it being an SMP problem with shared IRQs; probably from searching the freebsd-hackers list or from Intel documentation. Anyway, I made the change and it solved the problem. The BIOS setting is: PCI IRQs to IO-APIC Mapping: Enable Enabled- BIOS will use all 24 IO APIC pins in describing PCI interrupt conditions in the MP table. Disabled- Only 16 std ISA IRQs are used. Do not enable if OS does not support this feature. John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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