On 2015/7/3 21:20, Pintu Kumar wrote: > This patch provides 2 things: > 1. Add new control called shrink_memory in /proc/sys/vm/. > This control can be used to aggressively reclaim memory system-wide > in one shot from the user space. A value of 1 will instruct the > kernel to reclaim as much as totalram_pages in the system. > Example: echo 1 > /proc/sys/vm/shrink_memory > > 2. Enable shrink_all_memory API in kernel with new CONFIG_SHRINK_MEMORY. > Currently, shrink_all_memory function is used only during hibernation. > With the new config we can make use of this API for non-hibernation case > also without disturbing the hibernation case. > > The detailed paper was presented in Embedded Linux Conference, Mar-2015 > http://events.linuxfoundation.org/sites/events/files/slides/ > %5BELC-2015%5D-System-wide-Memory-Defragmenter.pdf > > Scenarios were this can be used and helpful are: > 1) Can be invoked just after system boot-up is finished. > 2) Can be invoked just before entering entire system suspend. > 3) Can be invoked from kernel when order-4 pages starts failing. > 4) Can be helpful to completely avoid or delay the kerenl OOM condition. > 5) Can be developed as a system-tool to quickly defragment entire system > from user space, without the need to kill any application. > Hi Pintu, How about increase min_free_kbytes and Android lowmemorykiller's level? Thanks, Xishi Qiu -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>