From 934387c99f1ce3c21b4f1fa67005dd95fbcee5e9 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Fri, 14 May 2021 15:08:29 -0400 Subject: mm/lru: Convert __pagevec_lru_add_fn to take a folio This saves five calls to compound_head(), totalling 60 bytes of text. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: David Howells Acked-by: Vlastimil Babka --- mm/swap.c | 49 +++++++++++++++++++++++++------------------------ 1 file changed, 25 insertions(+), 24 deletions(-) (limited to 'mm/swap.c') diff --git a/mm/swap.c b/mm/swap.c index 5c1674c98f82..858b4a8220ca 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -992,17 +992,18 @@ void __pagevec_release(struct pagevec *pvec) } EXPORT_SYMBOL(__pagevec_release); -static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec) +static void __pagevec_lru_add_fn(struct folio *folio, struct lruvec *lruvec) { - int was_unevictable = TestClearPageUnevictable(page); - int nr_pages = thp_nr_pages(page); + int was_unevictable = folio_test_clear_unevictable(folio); + long nr_pages = folio_nr_pages(folio); - VM_BUG_ON_PAGE(PageLRU(page), page); + VM_BUG_ON_FOLIO(folio_test_lru(folio), folio); /* - * Page becomes evictable in two ways: + * A folio becomes evictable in two ways: * 1) Within LRU lock [munlock_vma_page() and __munlock_pagevec()]. - * 2) Before acquiring LRU lock to put the page to correct LRU and then + * 2) Before acquiring LRU lock to put the folio on the correct LRU + * and then * a) do PageLRU check with lock [check_move_unevictable_pages] * b) do PageLRU check before lock [clear_page_mlock] * @@ -1011,35 +1012,36 @@ static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec) * * #0: __pagevec_lru_add_fn #1: clear_page_mlock * - * SetPageLRU() TestClearPageMlocked() + * folio_set_lru() folio_test_clear_mlocked() * smp_mb() // explicit ordering // above provides strict * // ordering - * PageMlocked() PageLRU() + * folio_test_mlocked() folio_test_lru() * * - * if '#1' does not observe setting of PG_lru by '#0' and fails - * isolation, the explicit barrier will make sure that page_evictable - * check will put the page in correct LRU. Without smp_mb(), SetPageLRU - * can be reordered after PageMlocked check and can make '#1' to fail - * the isolation of the page whose Mlocked bit is cleared (#0 is also - * looking at the same page) and the evictable page will be stranded - * in an unevictable LRU. + * if '#1' does not observe setting of PG_lru by '#0' and + * fails isolation, the explicit barrier will make sure that + * folio_evictable check will put the folio on the correct + * LRU. Without smp_mb(), folio_set_lru() can be reordered + * after folio_test_mlocked() check and can make '#1' fail the + * isolation of the folio whose mlocked bit is cleared (#0 is + * also looking at the same folio) and the evictable folio will + * be stranded on an unevictable LRU. */ - SetPageLRU(page); + folio_set_lru(folio); smp_mb__after_atomic(); - if (page_evictable(page)) { + if (folio_evictable(folio)) { if (was_unevictable) __count_vm_events(UNEVICTABLE_PGRESCUED, nr_pages); } else { - ClearPageActive(page); - SetPageUnevictable(page); + folio_clear_active(folio); + folio_set_unevictable(folio); if (!was_unevictable) __count_vm_events(UNEVICTABLE_PGCULLED, nr_pages); } - add_page_to_lru_list(page, lruvec); - trace_mm_lru_insertion(page); + lruvec_add_folio(lruvec, folio); + trace_mm_lru_insertion(folio); } /* @@ -1053,11 +1055,10 @@ void __pagevec_lru_add(struct pagevec *pvec) unsigned long flags = 0; for (i = 0; i < pagevec_count(pvec); i++) { - struct page *page = pvec->pages[i]; - struct folio *folio = page_folio(page); + struct folio *folio = page_folio(pvec->pages[i]); lruvec = folio_lruvec_relock_irqsave(folio, lruvec, &flags); - __pagevec_lru_add_fn(page, lruvec); + __pagevec_lru_add_fn(folio, lruvec); } if (lruvec) unlock_page_lruvec_irqrestore(lruvec, flags); -- cgit v1.2.3