Christophe Leroy <christophe.le...@c-s.fr> writes: > The number of high slices a process might use now depends on its > address space size, and what allocation address it has requested. > > This patch uses that limit throughout call chains where possible, > rather than use the fixed SLICE_NUM_HIGH for bitmap operations. > This saves some cost for processes that don't use very large address > spaces.
I haven't really looked at the final code. One of the issue we had was with the below scenario. mmap(addr, len) where addr < 128TB and addr+len > 128TB We want to make sure we build the mask such that we don't find the addr available. -aneesh
