diff options
| author | Vernon Yang <yanglincheng@kylinos.cn> | 2026-02-21 17:39:17 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-04-05 13:53:03 -0700 |
| commit | 6cc153f90b7cf07db2b49469dfd79141b145036a (patch) | |
| tree | a98b494392c764376e8ce4d8907ba7ad8e912ff1 | |
| parent | 34c1f77e4a639fd915cf262cba1ac7a29063a68d (diff) | |
mm: add folio_test_lazyfree helper
Add folio_test_lazyfree() function to identify lazy-free folios to improve
code readability.
Link: https://lkml.kernel.org/r/20260221093918.1456187-4-vernon2gm@gmail.com
Signed-off-by: Vernon Yang <yanglincheng@kylinos.cn>
Acked-by: David Hildenbrand (Red Hat) <david@kernel.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Reviewed-by: Dev Jain <dev.jain@arm.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Liam Howlett <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | include/linux/page-flags.h | 5 | ||||
| -rw-r--r-- | mm/rmap.c | 2 | ||||
| -rw-r--r-- | mm/vmscan.c | 5 |
3 files changed, 8 insertions, 4 deletions
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h index f7a0e4af0c73..415e9f2ef616 100644 --- a/include/linux/page-flags.h +++ b/include/linux/page-flags.h @@ -724,6 +724,11 @@ static __always_inline bool folio_test_anon(const struct folio *folio) return ((unsigned long)folio->mapping & FOLIO_MAPPING_ANON) != 0; } +static __always_inline bool folio_test_lazyfree(const struct folio *folio) +{ + return folio_test_anon(folio) && !folio_test_swapbacked(folio); +} + static __always_inline bool PageAnonNotKsm(const struct page *page) { unsigned long flags = (unsigned long)page_folio(page)->mapping; diff --git a/mm/rmap.c b/mm/rmap.c index 8f08090d7eb9..5fd22ba59d35 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -2060,7 +2060,7 @@ 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_test_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 031c5c035a82..d531040a3593 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_test_lazyfree(folio)) { *dirty = false; *writeback = false; return; @@ -1508,7 +1507,7 @@ retry: } } - if (folio_test_anon(folio) && !folio_test_swapbacked(folio)) { + if (folio_test_lazyfree(folio)) { /* follow __remove_mapping for reference */ if (!folio_ref_freeze(folio, 1)) goto keep_locked; |