1, When will adaptive lmk be triggered?

1.1 90 <= vmpressure <=94

file cache < maxmium lmk minfree

free pages < vmpressure_file_min

                if ((other_free < lowmem_minfree[array_size - 1]) &&
                    (other_file < vmpressure_file_min)) {

1.2 vmpressure >=95

2, Zcache stores compressed file pages which should be considered as reclaimable pages by lowmemorykiller in calculating values to be compared against minfree.

other_file = global_page_state(NR_FILE_PAGES) + zcache_pages()