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Thu, 18 Sep 2025 11:47:00 +0800 From: Baolin Wang To: akpm@linux-foundation.org, hannes@cmpxchg.org Cc: david@redhat.com, mhocko@kernel.org, zhengqi.arch@bytedance.com, shakeel.butt@linux.dev, lorenzo.stoakes@oracle.com, hughd@google.com, willy@infradead.org, baolin.wang@linux.alibaba.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 0/2] some cleanups for pageout() Date: Thu, 18 Sep 2025 11:46:52 +0800 Message-ID: X-Mailer: git-send-email 2.43.7 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 98E1C80009 X-Rspam-User: X-Rspamd-Server: rspam07 X-Stat-Signature: 9z36ufjmrr7xshh588b7sgefdpc5y7cw X-HE-Tag: 1758167225-906426 X-HE-Meta: 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 6xe6zkA2 LnQYvirtr94EzFg8MUIEV6A/w/wJwub+F+xFFdDbMu2qGqP3gYc+W3eRuvaRtj9x3K8d/Q3RlORWi35VU9SGUo2tnXU5e7VYb6Qbpevnyr88CRnEwT4SJ4ZCrNLPkek98PbYwXUDU65gutlUlk4XAn9VKo+aGW+0WjNZVJjcdRpvCWRuTtppff6AHeNO9ViaBRkjftvo6WC/u9tON5KvRbxnK4uBF9zfremWnyMcXmUnPONCtfWQsqWUz3VCvb+FNMU66piu4vpYBu1Coa++EiLH60SdDYR7SyTiG5LY0njAux2sWKKrIJ3UvQaKpS1wtpSOy X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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