The patch titled
Subject: buffer: use b_folio in mark_buffer_dirty()
has been added to the -mm mm-unstable branch. Its filename is
buffer-use-b_folio-in-mark_buffer_dirty.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/buffer-use-b_folio-in-mark_buffer_dirty.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: buffer: use b_folio in mark_buffer_dirty()
Date: Thu, 15 Dec 2022 21:43:57 +0000
Removes about four calls to compound_head(). Two of them are inline which
removes 132 bytes from the kernel text.
Link: https://lkml.kernel.org/r/20221215214402.3522366-8-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/buffer.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
--- a/fs/buffer.c~buffer-use-b_folio-in-mark_buffer_dirty
+++ a/fs/buffer.c
@@ -1095,16 +1095,16 @@ void mark_buffer_dirty(struct buffer_hea
}
if (!test_set_buffer_dirty(bh)) {
- struct page *page = bh->b_page;
+ struct folio *folio = bh->b_folio;
struct address_space *mapping = NULL;
- lock_page_memcg(page);
- if (!TestSetPageDirty(page)) {
- mapping = page_mapping(page);
+ folio_memcg_lock(folio);
+ if (!folio_test_set_dirty(folio)) {
+ mapping = folio->mapping;
if (mapping)
- __set_page_dirty(page, mapping, 0);
+ __folio_mark_dirty(folio, mapping, 0);
}
- unlock_page_memcg(page);
+ folio_memcg_unlock(folio);
if (mapping)
__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
}
_
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
