Re: [patch 3/8] mm: vmscan: save work scanning (almost) empty LRUlists

From: Rik van Riel
Date: Wed Dec 12 2012 - 17:04:43 EST

On 12/12/2012 04:43 PM, 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@xxxxxxxxxxx>

Reviewed-by: Rik van Riel <riel@xxxxxxxxxx>

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