Date: Mon, 10 Feb 2003 10:48:02 -0500 From: Bill Moran <wmoran@potentialtech.com> To: Jason Andresen <jandrese@mitre.org> Cc: Phil Reynolds <phil@tinsleyviaduct.com>, freebsd-stable@freebsd.org Subject: Re: PCI oddity Message-ID: <3E47C9B2.70809@potentialtech.com> References: <3E47BD31.8020604@mitre.org> <20030210145831.GA17756@tinsleyviaduct.com> <3E47C3D5.6000904@mitre.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Jason Andresen wrote: > Phil Reynolds wrote: > >> On Mon, Feb 10, 2003 at 09:54:41AM -0500, Jason Andresen wrote: >> >>> Hello, >>> I have an Abit BX6-II motherboard with 5 PCI slots. Whenever >>> I try to populate both of the bottom two slots, FreeBSD crash dumps >>> on boot. I have tried this with a variety of cards over the years, >>> but I always have the same results. >>> >>> Is this a FreeBSD problem, a motherboard problem, or a problem with the >>> PCI cards? >> >> A motherboard issue. It is normal for some slots to share bus >> mastering or >> IRQs. RTFM, it tells you which ones do, and also which ones share with >> on-board >> kit. > > My manual doesn't tell me squat about the interrupts on the board. My > guess what that the two slots share an IRQ, because PCI only has IIRC 4 > IRQ lines to go around. That's why I was worried it might be an issue > with FreeBSD being unable to support shared cards. In my experience, that's how it's set up. Can guarantee it with your board, but that's typical. > It is the bottom two PCI slots that give me problems though (one of > which is the shared PCI/ISA slot, but that doesn't seem to matter). No, but usually those last two slots share an interrupt. >>> Recently I realized that I really need 6 PCI cards in the box (5 ATA >>> controllers and 1 NIC). Right now it's semi-crippled with just the 4 >>> cards (3 ATA controllers with some drives on slaves and 1 NIC), and I >>> was thinking about upgrading to a Tyan Trinity 400. Will I not be >>> able to populate this board beyond 4 cards? >> >> It all depends on what is happy to share interrupts etc. > > Are there certain cards that are known to be good about sharing interrupts? Oh yeah. Make sure the card is designed to share interrupts or it won't work worth a hoot. Can't give you a list of what does and doesn't work off the top of my head ... I know most Intel NICs share interrupts OK. -- Bill Moran Potential Technologies http://www.potentialtech.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3E47C9B2.70809>