The patch titled
Subject: mm: add lazyfree folio to lru tail
has been added to the -mm mm-unstable branch. Its filename is
mm-add-lazyfree-folio-to-lru-tail.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-lazyfree-folio-to-lru-tail.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: gaoxu <gaoxu2@xxxxxxxxx>
Subject: mm: add lazyfree folio to lru tail
Date: Fri, 16 Aug 2024 07:48:01 +0000
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.
2. When mglru is enabled, the lazy-free folio is reclaimabled and
should be added using lru_gen_add_folio(lruvec, folio, true) instead of
lru_gen_add_folio(lruvec, folio, false) for adding to gen.
With the change in place, workingset_refault_file is reduced by 33% in the
continuous startup testing of the applications in the Android system.
Link: https://lkml.kernel.org/r/f29f64e29c08427b95e3df30a5770056@xxxxxxxxx
Signed-off-by: gao xu <gaoxu2@xxxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Shaohua Li <shli@xxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/swap.c~mm-add-lazyfree-folio-to-lru-tail
+++ a/mm/swap.c
@@ -641,7 +641,7 @@ static void lru_lazyfree(struct lruvec *
* anonymous folios
*/
folio_clear_swapbacked(folio);
- lruvec_add_folio(lruvec, folio);
+ lruvec_add_folio_tail(lruvec, folio);
__count_vm_events(PGLAZYFREE, nr_pages);
__count_memcg_events(lruvec_memcg(lruvec), PGLAZYFREE, nr_pages);
_
Patches currently in -mm which might be from gaoxu2@xxxxxxxxx are
mm-add-lazyfree-folio-to-lru-tail.patch
