/* drivers/misc/lowmemorykiller.c
 *
 * The lowmemorykiller driver lets user-space specify a set of memory thresholds
 * where processes with a range of oom_adj values will get killed. Specify the
 * minimum oom_adj values in /sys/module/lowmemorykiller/parameters/adj and the
 * number of free pages in /sys/module/lowmemorykiller/parameters/minfree. Both
 * files take a comma separated list of numbers in ascending order.
 *
 * For example, write "0,8" to /sys/module/lowmemorykiller/parameters/adj and
 * "1024,4096" to /sys/module/lowmemorykiller/parameters/minfree to kill 
processes
 * with a oom_adj value of 8 or higher when the free memory drops below 4096 
pages
 * and kill processes with a oom_adj value of 0 or higher when the free memory
 * drops below 1024 pages.
 *
 * The driver considers memory used for caches to be free, but if a large
 * percentage of the cached memory is locked this can be very inaccurate
 * and processes may not get killed until the normal oom killer is triggered.
 *


root@ubuntu-phablet:/# cat /sys/module/lowmemorykiller/parameters/adj     
0,1,6,12
root@ubuntu-phablet:/# cat /sys/module/lowmemorykiller/parameters/minfree 
1536,2048,4096,16384
root@ubuntu-phablet:/# grep oom /etc/init/lightdm.override 
oom score -10

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https://bugs.launchpad.net/bugs/1267092

Title:
  apps die randomly when the system hits ~80% RAM usage

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