Pass a pointer to the lruvec so we can take advantage of the folio_lruvec_relock_irqsave(). Adjust the calling convention of folio_lruvec_relock_irqsave() to suit and add a page_cache_release() wrapper. Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> --- include/linux/memcontrol.h | 16 +++++----- mm/swap.c | 62 ++++++++++++++++++-------------------- 2 files changed, 37 insertions(+), 41 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 46d9abb20761..8a0e8972a3d3 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -1705,18 +1705,18 @@ static inline struct lruvec *folio_lruvec_relock_irq(struct folio *folio, return folio_lruvec_lock_irq(folio); } -/* Don't lock again iff page's lruvec locked */ -static inline struct lruvec *folio_lruvec_relock_irqsave(struct folio *folio, - struct lruvec *locked_lruvec, unsigned long *flags) +/* Don't lock again iff folio's lruvec locked */ +static inline void folio_lruvec_relock_irqsave(struct folio *folio, + struct lruvec **lruvecp, unsigned long *flags) { - if (locked_lruvec) { - if (folio_matches_lruvec(folio, locked_lruvec)) - return locked_lruvec; + if (*lruvecp) { + if (folio_matches_lruvec(folio, *lruvecp)) + return; - unlock_page_lruvec_irqrestore(locked_lruvec, *flags); + unlock_page_lruvec_irqrestore(*lruvecp, *flags); } - return folio_lruvec_lock_irqsave(folio, flags); + *lruvecp = folio_lruvec_lock_irqsave(folio, flags); } #ifdef CONFIG_CGROUP_WRITEBACK diff --git a/mm/swap.c b/mm/swap.c index ad3f2e9448a4..dce5ea67ae05 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -74,22 +74,21 @@ static DEFINE_PER_CPU(struct cpu_fbatches, cpu_fbatches) = { .lock = INIT_LOCAL_LOCK(lock), }; -/* - * This path almost never happens for VM activity - pages are normally freed - * in batches. But it gets used by networking - and for compound pages. - */ -static void __page_cache_release(struct folio *folio) +static void __page_cache_release(struct folio *folio, struct lruvec **lruvecp, + unsigned long *flagsp) { if (folio_test_lru(folio)) { - struct lruvec *lruvec; - unsigned long flags; - - lruvec = folio_lruvec_lock_irqsave(folio, &flags); - lruvec_del_folio(lruvec, folio); + folio_lruvec_relock_irqsave(folio, lruvecp, flagsp); + lruvec_del_folio(*lruvecp, folio); __folio_clear_lru_flags(folio); - unlock_page_lruvec_irqrestore(lruvec, flags); } - /* See comment on folio_test_mlocked in folios_put() */ + + /* + * In rare cases, when truncation or holepunching raced with + * munlock after VM_LOCKED was cleared, Mlocked may still be + * found set here. This does not indicate a problem, unless + * "unevictable_pgs_cleared" appears worryingly large. + */ if (unlikely(folio_test_mlocked(folio))) { long nr_pages = folio_nr_pages(folio); @@ -99,9 +98,23 @@ static void __page_cache_release(struct folio *folio) } } +/* + * This path almost never happens for VM activity - pages are normally freed + * in batches. But it gets used by networking - and for compound pages. + */ +static void page_cache_release(struct folio *folio) +{ + struct lruvec *lruvec = NULL; + unsigned long flags; + + __page_cache_release(folio, &lruvec, &flags); + if (lruvec) + unlock_page_lruvec_irqrestore(lruvec, flags); +} + static void __folio_put_small(struct folio *folio) { - __page_cache_release(folio); + page_cache_release(folio); mem_cgroup_uncharge(folio); free_unref_page(&folio->page, 0); } @@ -115,7 +128,7 @@ static void __folio_put_large(struct folio *folio) * be called for hugetlb (it has a separate hugetlb_cgroup.) */ if (!folio_test_hugetlb(folio)) - __page_cache_release(folio); + page_cache_release(folio); destroy_large_folio(folio); } @@ -216,7 +229,7 @@ static void folio_batch_move_lru(struct folio_batch *fbatch, move_fn_t move_fn) if (move_fn != lru_add_fn && !folio_test_clear_lru(folio)) continue; - lruvec = folio_lruvec_relock_irqsave(folio, lruvec, &flags); + folio_lruvec_relock_irqsave(folio, &lruvec, &flags); move_fn(lruvec, folio); folio_set_lru(folio); @@ -999,24 +1012,7 @@ void folios_put_refs(struct folio_batch *folios, unsigned int *refs) continue; } - if (folio_test_lru(folio)) { - lruvec = folio_lruvec_relock_irqsave(folio, lruvec, - &flags); - lruvec_del_folio(lruvec, folio); - __folio_clear_lru_flags(folio); - } - - /* - * In rare cases, when truncation or holepunching raced with - * munlock after VM_LOCKED was cleared, Mlocked may still be - * found set here. This does not indicate a problem, unless - * "unevictable_pgs_cleared" appears worryingly large. - */ - if (unlikely(folio_test_mlocked(folio))) { - __folio_clear_mlocked(folio); - zone_stat_sub_folio(folio, NR_MLOCK); - count_vm_event(UNEVICTABLE_PGCLEARED); - } + __page_cache_release(folio, &lruvec, &flags); if (j != i) folios->folios[j] = folio; -- 2.43.0