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RE: [Xen-devel] DL385 G2 - PCI-DMA: Random memory would be DMAed
| To: | "Zachary Richmond" <admin.ihsdoor@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | RE: [Xen-devel] DL385 G2 - PCI-DMA: Random memory would be DMAed |
| From: | "Langsdorf, Mark" <mark.langsdorf@xxxxxxx> |
| Date: | Thu, 18 Oct 2007 16:13:47 -0500 |
| Delivery-date: | Thu, 18 Oct 2007 14:17:25 -0700 |
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| Thread-index: | AcgRxdHoTXGvJY1lQl6aQDFIPZ+lhAABU4Xg |
| Thread-topic: | [Xen-devel] DL385 G2 - PCI-DMA: Random memory would be DMAed |
> To answer Mark's question: > > > What kernel are you using? > > from gentoo: xen-sources-2.6.20-r6 > > Regarding the full error message, all I am getting is: > > kernel panic not syncing: PCI-DMA: Random memory would be DMAed > > since the machine is rebooting after that. There maybe > somewhere else to get more detail, but beyond dmesg or > messages I am not sure where else to look. For some reason, your kernel is running with pci-gart.c enabled, and dom0 is trying to allocate DMA through the AGP GART in your AMD64 processor's Northbridge. I didn't think Xen supported pci-gart, but maybe I missed a changeset. At any rate, passing iommu=soft should disable the pci-gart and allow you to use bounce buffering. Hopefully, that should clear up your problem. -Mark Langsdorf Operating System Research Center AMD _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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