Re: [PATCH 3/8] mm/zswap: Use PG_dropbehind instead of PG_reclaim

The recently introduced PG_dropbehind allows for freeing folios
immediately after writeback. Unlike PG_reclaim, it does not need vmscan
to be involved to get the folio freed.

Instead of using folio_set_reclaim(), use folio_set_dropbehind() in
zswap_writeback_entry().

Signed-off-by: Kirill A. Shutemov <redacted>
---
  mm/zswap.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/zswap.c b/mm/zswap.c
index 167ae641379f..c20bad0b0978 100644
--- a/mm/zswap.c
+++ b/mm/zswap.c

@@ -1096,8 +1096,8 @@ static int zswap_writeback_entry(struct zswap_entry *entry,
  	/* folio is up to date */
  	folio_mark_uptodate(folio);
  
-	/* move it to the tail of the inactive list after end_writeback */
-	folio_set_reclaim(folio);
+	/* free the folio after writeback */
+	folio_set_dropbehind(folio);