On Fri, Jul 02, 2010 at 12:09:02AM -0700, Zach Pfeffer wrote: > Hari Kanigeri wrote: > >> He demonstrated the usage of his code in one of the emails he sent out > >> initially. Did you go over that, and what (or how many) step would you > >> use with the current code to do the same thing? > > > > -- So is this patch set adding layers and abstractions to help the User ? > > > > If the idea is to share some memory across multiple devices, I guess > > you can achieve the same by calling the map function provided by iommu > > module and sharing the mapped address to the 10's or 100's of devices > > to access the buffers. You would only need a dedicated virtual pool > > per IOMMU device to manage its virtual memory allocations. > > Yeah, you can do that. My idea is to get away from explicit addressing > and encapsulate the "device address to physical address" link into a > mapping. The DMA-API already does this with the help of IOMMUs if they are present. What is the benefit of your approach over that? Joerg -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>