On 04/01/2013 01:27 PM, Kamezawa Hiroyuki wrote: > (2013/04/01 16:34), Glauber Costa wrote: >> There are scenarios in which we would like our programs to run faster. >> It is a hassle, when they are contained in memcg, that some of its >> allocations will fail and start triggering reclaim. This is not good >> for the program, that will now be slower. >> >> This patch implements boost mode for memcg. It exposes a u64 file >> "memcg boost". Every time you write anything to it, it will reduce the >> counters by ~20 %. Note that we don't want to actually reclaim pages, >> which would defeat the very goal of boost mode. We just make the >> res_counters able to accomodate more. >> >> This file is also available in the root cgroup. But with a slightly >> different effect. Writing to it will make more memory physically >> available so our programs can profit. >> >> Please ack and apply. >> > Nack. > >> Signed-off-by: Glauber Costa <glommer@xxxxxxxxxxxxx> > > Please update limit temporary. If you need call-shrink-explicitly-by-user, > I think you can add it. > I don't want to shrink memory because that will make applications slower. I want them to be faster, so they need to have more memory. There is solid research backing up my approach: http://www.dilbert.com/fast/2008-05-08/ -- 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>