On Thu, Mar 18, 2021 at 11:31:45PM +0800, Xiaofeng Cao wrote: > - * the address space in [new_end, old_start) some architectures > + * the address space in [new_end, old_start]. Some architectures [a,b] = {x: a <= x <= y} [a,b) = {x: a <= x < y} Not the same thing - closed vs. open on the right end.