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Sun, 11 Jan 2026 04:19:55 -0800 (PST) Received: from localhost.localdomain ([221.227.246.159]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34f6b07029fsm4877954a91.2.2026.01.11.04.19.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Jan 2026 04:19:55 -0800 (PST) From: Vernon Yang X-Google-Original-From: Vernon Yang To: akpm@linux-foundation.org, david@kernel.org Cc: lorenzo.stoakes@oracle.com, ziy@nvidia.com, dev.jain@arm.com, baohua@kernel.org, lance.yang@linux.dev, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang Subject: [PATCH mm-new v4 4/6] mm: add folio_is_lazyfree helper Date: Sun, 11 Jan 2026 20:19:07 +0800 Message-ID: <20260111121909.8410-5-yanglincheng@kylinos.cn> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260111121909.8410-1-yanglincheng@kylinos.cn> References: <20260111121909.8410-1-yanglincheng@kylinos.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: f9dhxs5zioj6j8rz3ky9rexyfhscjysi X-Rspamd-Queue-Id: 9FB48C000D X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1768133996-807280 X-HE-Meta: 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 4B6tgSvH and5Y2lCYbGiy2V6RvzxRSBkCTv+Dmv/n9DqtwCyJPPBqzk+/d/FnlewJVLaWojYH5QazySLHOhrV2fTZVSOOJJJ6zez2LVqaPRT0A/b4sQao2IpHz+w1hVHfe5rP3AzwCrUChtn3HWR7FwWIlzG8o8RSUB+6sA5oTekB20uoqR3mDtCISpDBcT6mL7jvZpY8qnzDbbHgHwjBTXHk5uucyCMbcm5vrWAfevGNtzSOnwGl2vbymq2kCW/NKAqENSIVLxF/n3Mh5wE7C9ItU0t5sEgxHcFelUktzwTQKNcatl2/PFJfv/WG0xaLwF2n3zRrZnfBdoPNsOUFi5O7yH3/K3bYQOnRvhxNiEdYQEFrLTqfgp4mx7skzgyK15yAnhjLGuzF85+Y8YNrBqezOia+S+bTLUuE2IO4Tz0xn0u3DR5IQNNeyK1vdXW0nA== 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: Add folio_is_lazyfree() function to identify lazy-free folios to improve code readability. Signed-off-by: Vernon Yang --- include/linux/mm_inline.h | 5 +++++ mm/rmap.c | 2 +- mm/vmscan.c | 5 ++--- 3 files changed, 8 insertions(+), 4 deletions(-) diff --git a/include/linux/mm_inline.h b/include/linux/mm_inline.h index fa2d6ba811b5..65a4ae52d915 100644 --- a/include/linux/mm_inline.h +++ b/include/linux/mm_inline.h @@ -35,6 +35,11 @@ static inline int page_is_file_lru(struct page *page) return folio_is_file_lru(page_folio(page)); } +static inline int folio_is_lazyfree(const struct folio *folio) +{ + return folio_test_anon(folio) && !folio_test_swapbacked(folio); +} + static __always_inline void __update_lru_size(struct lruvec *lruvec, enum lru_list lru, enum zone_type zid, long nr_pages) diff --git a/mm/rmap.c b/mm/rmap.c index 336b27e00238..fd335b171ea7 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -2042,7 +2042,7 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma, } if (!pvmw.pte) { - if (folio_test_anon(folio) && !folio_test_swapbacked(folio)) { + if (folio_is_lazyfree(folio)) { if (unmap_huge_pmd_locked(vma, pvmw.address, pvmw.pmd, folio)) goto walk_done; /* diff --git a/mm/vmscan.c b/mm/vmscan.c index 81828fa625ed..ad3516ff1381 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -964,8 +964,7 @@ static void folio_check_dirty_writeback(struct folio *folio, * They could be mistakenly treated as file lru. So further anon * test is needed. */ - if (!folio_is_file_lru(folio) || - (folio_test_anon(folio) && !folio_test_swapbacked(folio))) { + if (!folio_is_file_lru(folio) || folio_is_lazyfree(folio)) { *dirty = false; *writeback = false; return; @@ -1506,7 +1505,7 @@ static unsigned int shrink_folio_list(struct list_head *folio_list, } } - if (folio_test_anon(folio) && !folio_test_swapbacked(folio)) { + if (folio_is_lazyfree(folio)) { /* follow __remove_mapping for reference */ if (!folio_ref_freeze(folio, 1)) goto keep_locked; -- 2.51.0