Hello, On Tuesday, February 07, 2012 10:06 AM cp.zou wrote: > Hello everyone! > > I'm recently learning CMA, and I want to implement support for > contiguous memory areas placed in HIGHMEM zone,do you have any suggestions? CMA memory management core (migration and allocation of pages) should support areas placed in HIGHMEM without any additional works. The main limitation is in the DMA-mapping framework. Right now it makes certain assumptions about page mappings to simplify allocation process. You need to add support for dynamic mappings there. Best regards -- Marek Szyprowski Samsung Poland R&D Center -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>