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Sat, 03 Jan 2026 21:42:01 -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, richard.weiyang@gmail.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Vernon Yang Subject: [PATCH v3 4/6] mm: add folio_is_lazyfree helper Date: Sun, 4 Jan 2026 13:41:10 +0800 Message-ID: <20260104054112.4541-5-yanglincheng@kylinos.cn> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260104054112.4541-1-yanglincheng@kylinos.cn> References: <20260104054112.4541-1-yanglincheng@kylinos.cn> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: A1CAE80004 X-Stat-Signature: gsifd7q44wui7dsu8htfdow6ubzaraxa X-Rspam-User: X-HE-Tag: 1767505323-828669 X-HE-Meta: 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 0gX91yn4 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 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 | 4 ++-- mm/vmscan.c | 5 ++--- 3 files changed, 9 insertions(+), 5 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 f955f02d570e..7241a3fa8574 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1838,7 +1838,7 @@ static inline unsigned int folio_unmap_pte_batch(struct folio *folio, max_nr = (end_addr - addr) >> PAGE_SHIFT; /* We only support lazyfree batching for now ... */ - if (!folio_test_anon(folio) || folio_test_swapbacked(folio)) + if (!folio_is_lazyfree(folio)) return 1; if (pte_unused(pte)) return 1; @@ -1934,7 +1934,7 @@ 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 670fe9fae5ba..f357f74b5a35 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -963,8 +963,7 @@ 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; @@ -1501,7 +1500,7 @@ 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