Messages in this thread | | | From | "David S. Miller" <> | Date | Mon, 21 May 2001 01:11:27 -0700 (PDT) | Subject | Re: alpha iommu fixes |
| |
Alan Cox writes: > Pages allocated in main memory and mapped for access by PCI devices. On some > HP systems there is now way for such a page to stay coherent. It is quite > possible to sync the view but there is no sane way to allow any > pci_alloc_consistent to succeed
This is not what the HP folk told me, and in fact they said that pci_alloc_consistent could be made to work via disabling the cache attribute in the cpu side mappings or something similar in the PCI controller IOMMU mappings.
Please someone on the HPPA team provide details :-)
Later, David S. Miller davem@redhat.com - 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/
| |