Hi everybody!What about other things moving memory like CMA ?
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.