The patch titled
Subject: readahead: convert readahead_expand() to use a folio
has been added to the -mm mm-unstable branch. Its filename is
readahead-convert-readahead_expand-to-use-a-folio.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/readahead-convert-readahead_expand-to-use-a-folio.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx>
Subject: readahead: convert readahead_expand() to use a folio
Date: Mon, 16 Jan 2023 19:39:41 +0000
Replace the uses of page with a folio. Also add a missing test for
workingset in the leading edge expansion.
Link: https://lkml.kernel.org/r/20230116193941.2148487-4-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/readahead.c~readahead-convert-readahead_expand-to-use-a-folio
+++ a/mm/readahead.c
@@ -801,21 +801,25 @@ void readahead_expand(struct readahead_c
/* Expand the leading edge downwards */
while (ractl->_index > new_index) {
unsigned long index = ractl->_index - 1;
- struct page *page = xa_load(&mapping->i_pages, index);
+ struct folio *folio = xa_load(&mapping->i_pages, index);
- if (page && !xa_is_value(page))
- return; /* Page apparently present */
+ if (folio && !xa_is_value(folio))
+ return; /* Folio apparently present */
- page = __page_cache_alloc(gfp_mask);
- if (!page)
+ folio = filemap_alloc_folio(gfp_mask, 0);
+ if (!folio)
return;
- if (add_to_page_cache_lru(page, mapping, index, gfp_mask) < 0) {
- put_page(page);
+ if (filemap_add_folio(mapping, folio, index, gfp_mask) < 0) {
+ folio_put(folio);
return;
}
-
+ if (unlikely(folio_test_workingset(folio)) &&
+ !ractl->_workingset) {
+ ractl->_workingset = true;
+ psi_memstall_enter(&ractl->_pflags);
+ }
ractl->_nr_pages++;
- ractl->_index = page->index;
+ ractl->_index = folio->index;
}
new_len += new_start - readahead_pos(ractl);
@@ -824,19 +828,20 @@ void readahead_expand(struct readahead_c
/* Expand the trailing edge upwards */
while (ractl->_nr_pages < new_nr_pages) {
unsigned long index = ractl->_index + ractl->_nr_pages;
- struct page *page = xa_load(&mapping->i_pages, index);
+ struct folio *folio = xa_load(&mapping->i_pages, index);
- if (page && !xa_is_value(page))
- return; /* Page apparently present */
+ if (folio && !xa_is_value(folio))
+ return; /* Folio apparently present */
- page = __page_cache_alloc(gfp_mask);
- if (!page)
+ folio = filemap_alloc_folio(gfp_mask, 0);
+ if (!folio)
return;
- if (add_to_page_cache_lru(page, mapping, index, gfp_mask) < 0) {
- put_page(page);
+ if (filemap_add_folio(mapping, folio, index, gfp_mask) < 0) {
+ folio_put(folio);
return;
}
- if (unlikely(PageWorkingset(page)) && !ractl->_workingset) {
+ if (unlikely(folio_test_workingset(folio)) &&
+ !ractl->_workingset) {
ractl->_workingset = true;
psi_memstall_enter(&ractl->_pflags);
}
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
buffer-add-b_folio-as-an-alias-of-b_page.patch
buffer-replace-obvious-uses-of-b_page-with-b_folio.patch
buffer-use-b_folio-in-touch_buffer.patch
buffer-use-b_folio-in-end_buffer_async_read.patch
buffer-use-b_folio-in-end_buffer_async_write.patch
page_io-remove-buffer_head-include.patch
buffer-use-b_folio-in-mark_buffer_dirty.patch
gfs2-replace-obvious-uses-of-b_page-with-b_folio.patch
jbd2-replace-obvious-uses-of-b_page-with-b_folio.patch
nilfs2-replace-obvious-uses-of-b_page-with-b_folio.patch
reiserfs-replace-obvious-uses-of-b_page-with-b_folio.patch
mpage-use-b_folio-in-do_mpage_readpage.patch
mm-memcg-add-folio_memcg_check.patch
mm-remove-folio_pincount_ptr-and-head_compound_pincount.patch
mm-convert-head_subpages_mapcount-into-folio_nr_pages_mapped.patch
doc-clarify-refcount-section-by-referring-to-folios-pages.patch
mm-convert-total_compound_mapcount-to-folio_total_mapcount.patch
mm-convert-page_remove_rmap-to-use-a-folio-internally.patch
mm-convert-page_add_anon_rmap-to-use-a-folio-internally.patch
mm-convert-page_add_file_rmap-to-use-a-folio-internally.patch
mm-add-folio_add_new_anon_rmap.patch
mm-add-folio_add_new_anon_rmap-fix-2.patch
page_alloc-use-folio-fields-directly.patch
mm-use-a-folio-in-hugepage_add_anon_rmap-and-hugepage_add_new_anon_rmap.patch
mm-use-entire_mapcount-in-__page_dup_rmap.patch
mm-debug-remove-call-to-head_compound_mapcount.patch
hugetlb-remove-uses-of-folio_mapcount_ptr.patch
mm-convert-page_mapcount-to-use-folio_entire_mapcount.patch
mm-remove-head_compound_mapcount-and-_ptr-functions.patch
mm-reimplement-compound_order.patch
mm-reimplement-compound_nr.patch
mm-reimplement-compound_nr-fix.patch
mm-convert-set_compound_page_dtor-and-set_compound_order-to-folios.patch
mm-convert-is_transparent_hugepage-to-use-a-folio.patch
mm-convert-destroy_large_folio-to-use-folio_dtor.patch
hugetlb-remove-uses-of-compound_dtor-and-compound_nr.patch
mm-remove-first-tail-page-members-from-struct-page.patch
doc-correct-struct-folio-kernel-doc.patch
mm-move-page-deferred_list-to-folio-_deferred_list.patch
mm-huge_memory-remove-page_deferred_list.patch
mm-huge_memory-convert-get_deferred_split_queue-to-take-a-folio.patch
mm-convert-deferred_split_huge_page-to-deferred_split_folio.patch
shmem-convert-shmem_write_end-to-use-a-folio.patch
mm-add-vma_alloc_zeroed_movable_folio.patch
mm-convert-do_anonymous_page-to-use-a-folio.patch
mm-convert-wp_page_copy-to-use-folios.patch
mm-use-a-folio-in-copy_pte_range.patch
mm-use-a-folio-in-copy_present_pte.patch
mm-fs-convert-inode_attach_wb-to-take-a-folio.patch
mm-convert-mem_cgroup_css_from_page-to-mem_cgroup_css_from_folio.patch
mm-remove-page_evictable.patch
mm-remove-mlock_vma_page.patch
mm-remove-munlock_vma_page.patch
mm-clean-up-mlock_page-munlock_page-references-in-comments.patch
rmap-add-folio-parameter-to-__page_set_anon_rmap.patch
filemap-convert-filemap_map_pmd-to-take-a-folio.patch
filemap-convert-filemap_range_has_page-to-use-a-folio.patch
readahead-convert-readahead_expand-to-use-a-folio.patch
