On Thu, Jul 22, 2010 at 08:39:17AM +0100, Russell King - ARM Linux wrote: > On Wed, Jul 21, 2010 at 09:30:34PM -0700, Zach Pfeffer wrote: > > This goes to the nub of the issue. We need a lot of 1 MB physically > > contiguous chunks. The system is going to fragment and we'll never get > > our 12 1 MB chunks that we'll need, since the DMA API allocator uses > > the system pool it will never succeed. > > By the "DMA API allocator" I assume you mean the coherent DMA interface, > The DMA coherent API and DMA streaming APIs are two separate sub-interfaces > of the DMA API and are not dependent on each other. I didn't know that, but yes. As far as I can tell they both allocate memory from the VM. We'd need a way to hook in our our own minimized mapping allocator. -- 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>