On 2013/12/11 9:06, H. Peter Anvin wrote: > Ok, the issue I thought we were discussing was actually [A,B) [B,C) [C,D) ... > Hi Peter, Yes, in this case the function will return 1. Thanks, Xishi Qiu > Yinghai Lu <yinghai@xxxxxxxxxx> wrote: >> On Tue, Dec 10, 2013 at 2:51 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote: >>> On 12/10/2013 01:52 PM, Yinghai Lu wrote: >>>>> >>>>> What happens if it spans more than two regions? >>>> >>>> [A, B), [B+1, C), [C+1, D) ? >>>> start in [A, B), and end in [C+1, D). >>>> >>>> old code: >>>> first with [A, B), start set to B. >>>> then with [B+1, C), start still keep as B. >>>> then with [C+1, D), start still keep as B. >>>> at last still return 0...aka not_all_mapped. >>>> >>>> old code is still right. >>>> >>> >>> Why not_all_mapped? >> >> [B, B+1), and [C, C+1) are not there. > -- 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>