On Mon 23-10-17 19:52:27, C.Wehrmeyer wrote: [...] > > or you can mmap a larger block and > > munmap the initial unaligned part. > > And how is that supposed to be transparent? When I hear "transparent" I > think of a mechanism which I can put under a system so that it benefits from > it, while the system does not notice or at least does not need to be aware > of it. The system also does not need to be changed for it.
How do you expect to get a huge page when the mapping itself is not properly aligned? Sure if you have a large mapping then you probably do not care about first and last chunk being not 2MB aligned but in order to get a THP you really need a 2MB aligned address. -- Michal Hocko SUSE Labs
