Messages in this thread | | | Date | Tue, 05 Jun 2012 17:00:14 +0900 | From | Minchan Kim <> | Subject | Re: [PATCH 0/5] Some vmevent fixes... |
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Hi Peakk,
On 06/05/2012 04:53 PM, Pekka Enberg wrote:
> On Mon, Jun 4, 2012 at 4:35 PM, Anton Vorontsov <cbouatmailru@gmail.com> 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
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