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> On Fri, Oct 28, 2005 at 12:16:51AM +0200, Andi Kleen wrote: > > I will attach my own; A brand new Amd64 dual-core thing. > Works fine with mem=2500M, but blows up with mem=3G or > without any override and full 4G complement in use. > > This board (ASUS A8N-SLI) does use NVIDIA nForce4 chipset with > bios-option to map (hoist) "excess memory" out from first 4G to > higher physical addresses so that it can be accessed by the > processor. > > This board has no AGP at all in it, but it does have lots > of PCIE, and a bit of PCI-X thrown in for "legacy cards". > Somehow that detail breaks things when the machine really > should use bounce-buffering, or something similar -- I don't > know if Nvidia nForce4 chipset does have IOMMU, though... > > If Nvidia did omit such essential piece of hardware from > a modern chipset, I do find it amazingly short-sighted... > (Of course they don't yield documentation of the chips to > public so that I can't quickly verify this detail...) For what it's worth I have almost the exact same hardware and got the same error. Athlon X2 4400 with the same ASUS board. Reverting to 2.6.13.2 kernel works. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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