On 09/14/2018 11:04 AM, Prakash Sangappa wrote: > Also, for valid VMAs in 'maps' file, if the VMA is sparsely > populated with physical pages, the page walk can skip over non > existing page table entires (PMDs) and so can be faster. Note that this only works for things that were _never_ populated. They might be sparse after once being populated and then being reclaimed or discarded. Those will still have all the page tables allocated.
