On Sun, Mar 19, 2017 at 02:25:08PM +0530, Aneesh Kumar K.V wrote: > >>> So if I have done a successful mmap which returned > 128TB what should a > >>> following mmap(0,...) return ? Should that now search the *full* address > >>> space or below 128TB ? > >> > >> No, I don't think so. And this implementation doesn't do this. > >> > >> It's safer this way: if an library can't handle high addresses, it's > >> better not to switch it automagically to full address space if other part > >> of the process requested high address. > >> > > > > What is the epectation when the hint addr is below 128TB but addr + len > > > 128TB ? Should such mmap request fail ? > > Considering that we have stack at the top (around 128TB) we may not be > able to get a free area for such a request. But I guess the idea here is > that if hint address is below 128TB, we behave as though our TASK_SIZE > is 128TB ? Is that correct ? Right. -- Kirill A. Shutemov
