On Fri, Feb 06, 2015 at 01:58:25PM +0100, Michal Hocko wrote: > On Thu 05-02-15 16:33:11, Shaohua Li wrote: > [...] > > Did you think about move the MADV_FREE pages to the head of inactive LRU, so > > they can be reclaimed easily? > > Yes this makes sense for pages living on the active LRU list. I would > preserve LRU ordering on the inactive list because there is no good > reason to make the operation more costly for inactive pages. On the > other hand having tons of to-be-freed pages on the active list clearly > sucks. Care to send a patch? Considering anon pages are in active LRU first, it's likely MADV_FREE pages are in active list. I'm curious why preserves the order of inactive list. App knows which pages are cold, why don't take the advantages? I'll play the patch more to see what I can do for it. Thanks, Shaohua -- 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>