On Fri 30-12-16 17:37:42, Michal Hocko wrote: > On Sat 31-12-16 01:04:56, Minchan Kim wrote: [...] > > > - nr_rotated pages which tells us that we are hitting referenced > > > pages which are deactivated. If this is a large part of the > > > reported nr_deactivated pages then the active list is too small > > > > It might be but not exactly. If your goal is to know LRU size, it can be > > done in get_scan_count. I tend to agree LRU size is helpful for > > performance analysis because decreased LRU size signals memory shortage > > then performance drop. > > No, I am not really interested in the exact size but rather to allow to > find whether we are aging the active list too early...
But thinking about that some more, maybe sticking with the nr_rotated terminology is rather confusing and displaying the value as nr_referenced would be more clear. -- Michal Hocko SUSE Labs