Re: [PATCH v2] mm: add lazyfree folio to lru tail

Michal Hocko
2024-08-21T12:46:30Z

On Fri 16-08-24 07:48:01, gaoxu wrote:
> Replace lruvec_add_folio with lruvec_add_folio_tail in the lru_lazyfree_fn:
> 1. The lazy-free folio is added to the LRU_INACTIVE_FILE list. If it's
> moved to the LRU tail, it allows for faster release lazy-free folio and
> reduces the impact on file refault.

This has been discussed when MADV_FREE was introduced. The question was
whether this memory has a lower priority than other inactive memory that
has been marked that way longer ago. Also consider several MADV_FREE
users should they be LIFO from the reclaim POV?

--
Michal Hocko
SUSE Labs