2011/5/3 Michal Hocko <mhocko@xxxxxxx>: > On Sun 01-05-11 15:06:02, KOSAKI Motohiro wrote: >> > On Mon 25-04-11 18:28:49, KAMEZAWA Hiroyuki wrote: >> > > There are two watermarks added per-memcg including "high_wmark" and "low_wmark". >> > > The per-memcg kswapd is invoked when the memcg's memory usage(usage_in_bytes) >> > > is higher than the low_wmark. Then the kswapd thread starts to reclaim pages >> > > until the usage is lower than the high_wmark. >> > >> > I have mentioned this during Ying's patchsets already, but do we really >> > want to have this confusing naming? High and low watermarks have >> > opposite semantic for zones. >> >> Can you please clarify this? I feel it is not opposite semantics. > > In the global reclaim low watermark represents the point when we _start_ > background reclaim while high watermark is the _stopper_. Watermarks are > based on the free memory while this proposal makes it based on the used > memory. > I understand that the result is same in the end but it is really > confusing because you have to switch your mindset from free to used and > from under the limit to above the limit. Ah, right. So, do you have an alternative idea? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>