On 11/11/2013 4:13 PM, Russell King - ARM Linux wrote:
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.
Yes, that is a typo. Thanks, Laura -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- 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>