| Date | Thu, 13 Dec 2012 10:41:04 +0000 | From | Mel Gorman <> | Subject | Re: [patch 3/8] mm: vmscan: save work scanning (almost) empty LRU lists |
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On Wed, Dec 12, 2012 at 04:43:35PM -0500, Johannes Weiner wrote: > In certain cases (kswapd reclaim, memcg target reclaim), a fixed > minimum amount of pages is scanned from the LRU lists on each > iteration, to make progress. > > Do not make this minimum bigger than the respective LRU list size, > however, and save some busy work trying to isolate and reclaim pages > that are not there. > > Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
This looks like a corner case where the LRU size would have to be smaller than SWAP_CLUSTER_MAX. Is that common enough to care? It looks correct, I'm just curious.
Acked-by: Mel Gorman <mgorman@suse.de>
-- Mel Gorman SUSE Labs
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