[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Failure to get memory for GATT table, again
> hmm, actually it seems the case is that dma_alloc_coherent() falls back to > calling __get_free_pages(), because dev->dma_mem is NULL. When the returned > address gets converted into a bus address, the resulting address seems to be > within Xen-space :-( > > Why is calling __get_free_pages() a problem? The AGP aperture needs a set of machine contiguous pages, whereas get_free_pages will only give you pseudo-physical contiguous. Drivers are supposed to use the former (for reasons of ensuring DMA coherence) , but the agp drivers seem particularly shoddy, probably because they've only ever been used on x86. Ian ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/xen-devel
|
![]() |
Lists.xenproject.org is hosted with RackSpace, monitoring our |