Re: [PATCH v3 1/9] mm/vmscan: make active/inactive ratio as 1:1 for anon lru

[Johannes Weiner]

On Tue, Mar 17, 2020 at 02:41:49PM +0900, js1304@xxxxxxxxx wrote:
> From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
> 
> Current implementation of LRU management for anonymous page has some
> problems. Most important one is that it doesn't protect the workingset,
> that is, pages on the active LRU list. Although, this problem will be
> fixed in the following patchset, the preparation is required and
> this patch does it.
> 
> What following patchset does is to restore workingset protection. In this
> case, newly created or swap-in pages are started their lifetime on the
> inactive list. If inactive list is too small, there is not enough chance
> to be referenced and the page cannot become the workingset.
> 
> In order to provide enough chance to the newly anonymous pages, this patch
> makes active/inactive LRU ratio as 1:1.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>