Re: can device drivers return non-ram via vm_ops->nopage?

[Richard Curnow]

* Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> [2004-03-22]:
> DRI suffers from similar issue when using PCI GART, but then, it also
> doesn't use the consistent alloc routines, it gets pages with GFP,
> mmap those into userland, and does pci_map_single in the kernel on
> each individual page to obtain the bus addresses. This will not be
> pretty on non-coherent architectures though.

... or on platforms where PCI bounce-buffers are being used.

-- 
Richard \\\ SH-4/SH-5 Core & Debug Architect
Curnow  \\\         SuperH (UK) Ltd, Bristol
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