Re: RFC: Easy-Reclaimable LRU list

[Glauber Costa]

On 06/19/2012 09:49 AM, Minchan Kim wrote:
> Hi everybody!
>
> Recently, there are some efforts to handle system memory pressure.
>
> 1) low memory notification - [1]
> 2) fallocate(VOLATILE) - [2]
> 3) fadvise(NOREUSE) - [3]
>
> For them, I would like to add new LRU list, aka "Ereclaimable" which is opposite of "unevictable".
> Reclaimable LRU list includes_easy_  reclaimable pages.
> For example, easy reclaimable pages are following as.
>
> 1. invalidated but remained LRU list.
> 2. pageout pages for reclaim(PG_reclaim pages)
> 3. fadvise(NOREUSE)
> 4. fallocate(VOLATILE)
>
> Their pages shouldn't stir normal LRU list and compaction might not migrate them, even.
What about other things moving memory like CMA ?



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