linux-kernel - [PATCH v2 0/2] some cleanups for pageout()

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Message-ID: <cover.1758166683.git.baolin.wang@linux.alibaba.com>
Date: Thu, 18 Sep 2025 11:46:52 +0800
From: Baolin Wang <baolin.wang@...ux.alibaba.com>
To: akpm@...ux-foundation.org,
	hannes@...xchg.org
Cc: david@...hat.com,
	mhocko@...nel.org,
	zhengqi.arch@...edance.com,
	shakeel.butt@...ux.dev,
	lorenzo.stoakes@...cle.com,
	hughd@...gle.com,
	willy@...radead.org,
	baolin.wang@...ux.alibaba.com,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] some cleanups for pageout()

Since we no longer attempt to write back filesystem folios in pageout(),
and only tmpfs/shmem folios and anonymous swapcache folios can be written
back, we can remove the redundant folio_test_private() related logic to
simplify the logic of pageout(), as tmpfs/shmem and swapcache folios do
not use the PG_private flag.

Changes from v1:
 - Re-write the commit message for patch 1 after discussing with Hugh. Thanks.
 - Add a warning to catch this unlikely case.
 - Add acked tags. Thanks.

Baolin Wang (2):
  mm: vmscan: remove folio_test_private() check in pageout()
  mm: vmscan: simplify the folio refcount check in pageout()

 mm/vmscan.c | 28 +++++++---------------------
 1 file changed, 7 insertions(+), 21 deletions(-)

-- 
2.43.7