On Thu, 22 Sep 2016, zijun_hu wrote: > > We don't support inserting when va->va_start == tmp_va->va_end, plain and > > simple. There's no reason to do so. NACK to the patch. > > > i am sorry i disagree with you because > 1) in almost all context of vmalloc, original logic treat the special case as normal > for example, __find_vmap_area() or alloc_vmap_area() The ranges are [start, end) like everywhere else. __find_vmap_area() is implemented as such for the passed address. The address is aligned in alloc_vmap_area(), there's no surprise here. The logic is correct in __insert_vmap_area(). -- 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>