From 1b7f7e58decccb52d6bc454413e3298f1ab3a9c6 Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 17 Feb 2022 12:46:35 -0500 Subject: [PATCH] mm/gup: Convert check_and_migrate_movable_pages() to use a folio Switch from head pages to folios. This removes an assumption that THPs are the only way to have a high-order page. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: John Hubbard Reviewed-by: Jason Gunthorpe Reviewed-by: William Kucharski --- mm/gup.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index 5edd05df9c37..35d550dde7ff 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -1784,43 +1784,44 @@ static long check_and_migrate_movable_pages(unsigned long nr_pages, unsigned int gup_flags) { unsigned long isolation_error_count = 0, i; - struct page *prev_head = NULL; + struct folio *prev_folio = NULL; LIST_HEAD(movable_page_list); bool drain_allow = true; int ret = 0; for (i = 0; i < nr_pages; i++) { - struct page *head = compound_head(pages[i]); + struct folio *folio = page_folio(pages[i]); - if (head == prev_head) + if (folio == prev_folio) continue; - prev_head = head; + prev_folio = folio; - if (is_pinnable_page(head)) + if (folio_is_pinnable(folio)) continue; /* * Try to move out any movable page before pinning the range. */ - if (PageHuge(head)) { - if (!isolate_huge_page(head, &movable_page_list)) + if (folio_test_hugetlb(folio)) { + if (!isolate_huge_page(&folio->page, + &movable_page_list)) isolation_error_count++; continue; } - if (!PageLRU(head) && drain_allow) { + if (!folio_test_lru(folio) && drain_allow) { lru_add_drain_all(); drain_allow = false; } - if (isolate_lru_page(head)) { + if (folio_isolate_lru(folio)) { isolation_error_count++; continue; } - list_add_tail(&head->lru, &movable_page_list); - mod_node_page_state(page_pgdat(head), - NR_ISOLATED_ANON + page_is_file_lru(head), - thp_nr_pages(head)); + list_add_tail(&folio->lru, &movable_page_list); + node_stat_mod_folio(folio, + NR_ISOLATED_ANON + folio_is_file_lru(folio), + folio_nr_pages(folio)); } if (!list_empty(&movable_page_list) || isolation_error_count)