Hi Peakk, On 06/05/2012 04:53 PM, Pekka Enberg wrote: > On Mon, Jun 4, 2012 at 4:35 PM, Anton Vorontsov <cbouatmailru@xxxxxxxxx> wrote: >>> I don't mean VMEVENT_ATTR_LOWMEM_PAGES but following as, >>> >>> VMEVENT_ATTR_NR_FREE_PAGES >>> VMEVENT_ATTR_NR_SWAP_PAGES >>> VMEVENT_ATTR_NR_AVAIL_PAGES >>> >>> I'm not sure how it is useful. >> >> Yep, these raw values are mostly useless, and personally I don't use >> these plain attributes. I use heuristics, i.e. "blended" attributes. >> If we can come up with levels-based approach w/o using vmstat, well.. >> OK then. > > That's what Nokia's lowmem notifier uses. We can probably drop them > once we have something else they could use. Next concern is that periodic timer of implementation. I think it would add direct hook in vmscan.c rather than peeking raw vmstat periodically by timer so we can control more fine-grained way without unnecessary overhead. -- Kind regards, Minchan Kim -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>