diff mbox series

[06/59] mm: Reimplement folio_order() and folio_nr_pages()

Message ID	20220808193430.3378317-7-willy@infradead.org (mailing list archive)
State	New
Headers	show Return-Path: <owner-linux-mm@kvack.org> From: "Matthew Wilcox (Oracle)" <willy@infradead.org> To: linux-mm@kvack.org Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>, hughd@google.com Subject: [PATCH 06/59] mm: Reimplement folio_order() and folio_nr_pages() Date: Mon, 8 Aug 2022 20:33:34 +0100 Message-Id: <20220808193430.3378317-7-willy@infradead.org> In-Reply-To: <20220808193430.3378317-1-willy@infradead.org> References: <20220808193430.3378317-1-willy@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org Precedence: bulk
Series	MM folio changes for 6.1 \| expand [00/59] MM folio changes for 6.1 [01/59] mm: Fix VM_BUG_ON in __delete_from_swap_cache() [02/59] shmem: Update folio if shmem_replace_page() updates the page [03/59] vmscan: Check folio_test_private(), not folio_get_private() [04/59] mm/vmscan: Fix a lot of comments [05/59] mm: Add the first tail page to struct folio [06/59] mm: Reimplement folio_order() and folio_nr_pages() [07/59] mm: Add split_folio() [08/59] mm: Add folio_add_lru_vma() [09/59] shmem: Convert shmem_writepage() to use a folio throughout [10/59] shmem: Convert shmem_delete_from_page_cache() to take a folio [11/59] shmem: Convert shmem_replace_page() to use folios throughout [12/59] mm/swapfile: Remove page_swapcount() [13/59] mm/swapfile: Convert try_to_free_swap() to folio_free_swap() [14/59] mm/swap: Convert __read_swap_cache_async() to use a folio [15/59] mm/swap: Convert add_to_swap_cache() to take a folio [16/59] mm/swap: Convert put_swap_page() to put_swap_folio() [17/59] mm: Convert do_swap_page() to use a folio [18/59] mm: Convert do_swap_page()'s swapcache variable to a folio [19/59] memcg: Convert mem_cgroup_swapin_charge_page() to mem_cgroup_swapin_charge_folio() [20/59] shmem: Convert shmem_mfill_atomic_pte() to use a folio [21/59] shmem: Convert shmem_replace_page() to shmem_replace_folio() [22/59] swap: Add swap_cache_get_folio() [23/59] shmem: Eliminate struct page from shmem_swapin_folio() [24/59] shmem: Convert shmem_getpage_gfp() to shmem_get_folio_gfp() [25/59] shmem: Convert shmem_fault() to use shmem_get_folio_gfp() [26/59] shmem: Convert shmem_read_mapping_page_gfp() to use shmem_get_folio_gfp() [27/59] shmem: Add shmem_get_folio() [28/59] shmem: Convert shmem_get_partial_folio() to use shmem_get_folio() [29/59] shmem: Convert shmem_write_begin() to use shmem_get_folio() [30/59] shmem: Convert shmem_file_read_iter() to use shmem_get_folio() [31/59] shmem: Convert shmem_fallocate() to use a folio [32/59] shmem: Convert shmem_symlink() to use a folio [33/59] shmem: Convert shmem_get_link() to use a folio [34/59] khugepaged: Call shmem_get_folio() [35/59] userfaultfd: Convert mcontinue_atomic_pte() to use a folio [36/59] shmem: Remove shmem_getpage() [37/59] swapfile: Convert try_to_unuse() to use a folio [38/59] swapfile: Convert __try_to_reclaim_swap() to use a folio [39/59] swapfile: Convert unuse_pte_range() to use a folio [40/59] mm: Convert do_swap_page() to use swap_cache_get_folio() [41/59] mm: Remove lookup_swap_cache() [42/59] swap_state: Convert free_swap_cache() to use a folio [43/59] swap: Convert swap_writepage() to use a folio [44/59] mm: Convert do_wp_page() to use a folio [45/59] huge_memory: Convert do_huge_pmd_wp_page() to use a folio [46/59] madvise: Convert madvise_free_pte_range() to use a folio [47/59] uprobes: Use folios more widely in __replace_page() [48/59] ksm: Use a folio in replace_page() [49/59] mm: Convert do_swap_page() to use folio_free_swap() [50/59] memcg: Convert mem_cgroup_swap_full() to take a folio [51/59] mm: Remove try_to_free_swap() [52/59] rmap: Convert page_move_anon_rmap() to use a folio [53/59] migrate: Convert __unmap_and_move() to use folios [54/59] migrate: Convert unmap_and_move_huge_page() to use folios [55/59] huge_memory: Convert split_huge_page_to_list() to use a folio [56/59] huge_memory: Convert unmap_page() to unmap_folio() [57/59] mm: Convert page_get_anon_vma() to folio_get_anon_vma() [58/59] rmap: Remove page_unlock_anon_vma_read() [59/59] uprobes: Use new_folio in __replace_page()

Commit Message

Matthew Wilcox Aug. 8, 2022, 7:33 p.m. UTC

Instead of calling compound_order() and compound_nr_pages(), use
the folio directly.  Saves 1905 bytes from mm/filemap.o due to
folio_test_large() now being a cheaper check than PageHead().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 include/linux/mm.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff mbox series

Patch

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 18e01474cf6b..7ee34dcf1aa3 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -697,7 +697,9 @@  static inline unsigned int compound_order(struct page *page)
  */
 static inline unsigned int folio_order(struct folio *folio)
 {
-	return compound_order(&folio->page);
+	if (!folio_test_large(folio))
+		return 0;
+	return folio->_folio_order;
 }
 
 #include <linux/huge_mm.h>
@@ -1590,7 +1592,13 @@  static inline void set_page_links(struct page *page, enum zone_type zone,
  */
 static inline long folio_nr_pages(struct folio *folio)
 {
-	return compound_nr(&folio->page);
+	if (!folio_test_large(folio))
+		return 1;
+#ifdef CONFIG_64BIT
+	return folio->_folio_nr_pages;
+#else
+	return 1L << folio->_folio_order;
+#endif
 }
 
 /**