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Message-ID: <20080813013255.GD633804@hiwaay.net> Date: Tue, 12 Aug 2008 20:32:55 -0500 From: Chris Adams <cmadams@...aay.net> To: linux-kernel@...r.kernel.org Subject: AGP aperture beyond 4GB not valid? I have an MSI K9A Platinum motherboard (AMD CrossFire 580X and SB600 chipset) with 4G RAM, and I'm running Fedora 9 (x86_64) with kernel 2.6.25.11-97.fc9.x86_64. When I boot, I see the following go by: Checking aperture... Node 0: aperture @ 1006000000 size 32 MB Aperture beyond 4GB. Ignoring. No AGP bridge found Your BIOS doesn't leave a aperture memory hole Please enable the IOMMU option in the BIOS setup This costs you 64 MB of RAM Mapping aperture over 65536 KB of RAM @ c000000 PM: Registered nosave memory: 000000000c000000 - 0000000010000000 My BIOS doesn't have an IOMMU option (latest BIOS available for the mboard). However, it appears that an aperture is allocated but the kernel then ignores it due to where it is placed. Why? Is there anything I can or should do about this (what impact does this really have)? -- Chris Adams <cmadams@...aay.net> Systems and Network Administrator - HiWAAY Internet Services I don't speak for anybody but myself - that's enough trouble. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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