On Fri 20-05-16 16:44:50, Minchan Kim wrote: > > > > That being said khugepaged_max_ptes_none = HPAGE_PMD_NR/2 sounds like a > > > > > > max_ptes_none? > > > > Not sure I understand what you mean here. > > We are talking about max_ptes_swap and max_active_pages(i.e., pte_young) > but suddenly you are saying max_ptes_none so I was curious it was just > typo. Because the default for pte_none resp. zero pages collapsing into THP is khugepaged_max_ptes_none and the current default means that a single present page is sufficient. That is way too optimistic. So I consider this to be a good start. I am not so sure about minimum young pages because that would probably require yet another tunable and we have more than enough of them. Anyway I guess we are getting off-topic here... -- 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>