hi Johannes My name is Zhiyuan zhu, an android development engineer in htc. We encounter a lowmemorykiller¡¯s problem. Coluld you help to kindly support? Thank you. Problem describtion: We noticed that gap of dumping cached value from ¡°lowmemorykiller¡± and ¡°/proc/meminfo/¡± are different apparently. Like example below, lowmemorykiller showed cache only has 72460kB while launcher was killed, but /proc/meminfo showed cached still has 142448kB. Please check why the gap of cache value between lowmemorykill and /proc/meminfo are huge. kernel_e0058_0001_20141107_204711_LC4ABYA00200_htc_a31ul_0.54.999.1.txt at LC4ABYA00200 6 161030.084144 2014-11-07 21:44:53.304 lowmemorykiller: Killing 'om.htc.launcher' (4486), adj 294, 6 161030.084144 2014-11-07 21:44:53.304 to free 47856kB on behalf of 'kworker/u8:14' (20594) because 6 161030.084144 2014-11-07 21:44:53.304 cache 72460kB is below limit 73728kB for oom_score_adj 235 6 161030.084144 2014-11-07 21:44:53.304 Free memory is 51304kB above reserved 4 161030.084797 2014-11-07 21:44:53.304 MemFree: 55676 kB 4 161030.084797 2014-11-07 21:44:53.304 Buffers: 1240 kB 4 161030.084797 2014-11-07 21:44:53.304 Cached: 142448 kB Lowmemorykiller calculated cache value is 72460kB, but the /proc/meminfo¡¯s cached is 142448 kB After checked the code, I found that: Lowmemorykiller¡¯s memory information is comes from /proc/zoneinfo file¡¯s nr_file_pages So I want to know how different the /proc/zoneinfo file¡¯s nr_file_pages and /proc/meminfo file¡¯s Cached ? Thanks Zhiyuan zhu MEMORY RESOURCE CONTROLLER M: Johannes Weiner M: Michal Hocko M: Balbir Singh M: KAMEZAWA Hiroyuki L: cgroups@vger.kernel.org L: linux-mm@kvack.org S: Maintained F: mm/memcontrol.c F: mm/page_cgroup.c