On Mon, Nov 11, 2013 at 03:26:48PM -0800, Laura Abbott wrote: > Hi, > > This is an RFC for a feature to allow lowmem and vmalloc virtual address space > to be intermixed. This has currently only been tested on a narrow set of ARM > chips. > > Currently on 32-bit systems we have > > > Virtual Physical > > PAGE_OFFSET +--------------+ PHYS_OFFSET +------------+ > | | | | > | | | | > | | | | > | lowmem | | direct | > | | | mapped | > | | | | > | | | | > | | | | > +--------------+------------------>x------------> > | | | | > | | | | > | | | not-direct| > | | | mapped | > | vmalloc | | | > | | | | > | | | | > | | | | > +--------------+ +------------+ > > Where part of the virtual spaced above PHYS_OFFSET is reserved for direct > mapped lowmem and part of the virtual address space is reserved for vmalloc. Minor nit... ITYM PAGE_OFFSET here. vmalloc space doesn't exist in physical memory. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>