On Mon 01-04-13 13:30:22, Glauber Costa wrote: > 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/ :) -- Michal Hocko SUSE Labs -- 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>