On 12/06/2016 07:54 PM, Yury Norov wrote:

3. Introduce new mmap64() syscall like this:
sys_mmap64(void *addr, size_t len, int prot, int flags, int fd, struct off_pair *off);
(The pointer here because otherwise we have 7 args, if simply pass off_hi and
off_lo in registers.)

I would prefer a batched mmap/munmap/mremap/mprotect/madvise interface, 
so that VM changes can be coalesced and the output reduced.  This 
interface could then be used to implement mmap on 32-bit architectures 
as well because the offset restrictions would not apply there.

Thanks,
Florian