The patch titled
Subject: reiserfs: convert writepage to use a folio
has been added to the -mm mm-unstable branch. Its filename is
reiserfs-convert-writepage-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/reiserfs-convert-writepage-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: reiserfs: convert writepage to use a folio
Date: Mon, 16 Oct 2023 21:11:09 +0100
Convert the incoming page to a folio and then use it throughout the
writeback path. This definitely isn't enough to support large folios, but
I don't expect reiserfs to gain support for those before it is removed.
Link: https://lkml.kernel.org/r/20231016201114.1928083-23-willy@xxxxxxxxxxxxx
Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Andreas Gruenbacher <agruenba@xxxxxxxxxx>
Cc: Pankaj Raghav <p.raghav@xxxxxxxxxxx>
Cc: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/reiserfs/inode.c | 80 +++++++++++++++++++++---------------------
1 file changed, 40 insertions(+), 40 deletions(-)
--- a/fs/reiserfs/inode.c~reiserfs-convert-writepage-to-use-a-folio
+++ a/fs/reiserfs/inode.c
@@ -2507,10 +2507,10 @@ out:
* start/recovery path as __block_write_full_folio, along with special
* code to handle reiserfs tails.
*/
-static int reiserfs_write_full_page(struct page *page,
+static int reiserfs_write_full_folio(struct folio *folio,
struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct inode *inode = folio->mapping->host;
unsigned long end_index = inode->i_size >> PAGE_SHIFT;
int error = 0;
unsigned long block;
@@ -2518,7 +2518,7 @@ static int reiserfs_write_full_page(stru
struct buffer_head *head, *bh;
int partial = 0;
int nr = 0;
- int checked = PageChecked(page);
+ int checked = folio_test_checked(folio);
struct reiserfs_transaction_handle th;
struct super_block *s = inode->i_sb;
int bh_per_page = PAGE_SIZE / s->s_blocksize;
@@ -2526,47 +2526,46 @@ static int reiserfs_write_full_page(stru
/* no logging allowed when nonblocking or from PF_MEMALLOC */
if (checked && (current->flags & PF_MEMALLOC)) {
- redirty_page_for_writepage(wbc, page);
- unlock_page(page);
+ folio_redirty_for_writepage(wbc, folio);
+ folio_unlock(folio);
return 0;
}
/*
- * The page dirty bit is cleared before writepage is called, which
+ * The folio dirty bit is cleared before writepage is called, which
* means we have to tell create_empty_buffers to make dirty buffers
- * The page really should be up to date at this point, so tossing
+ * The folio really should be up to date at this point, so tossing
* in the BH_Uptodate is just a sanity check.
*/
- if (!page_has_buffers(page)) {
- create_empty_buffers(page, s->s_blocksize,
+ head = folio_buffers(folio);
+ if (!head)
+ head = folio_create_empty_buffers(folio, s->s_blocksize,
(1 << BH_Dirty) | (1 << BH_Uptodate));
- }
- head = page_buffers(page);
/*
- * last page in the file, zero out any contents past the
+ * last folio in the file, zero out any contents past the
* last byte in the file
*/
- if (page->index >= end_index) {
+ if (folio->index >= end_index) {
unsigned last_offset;
last_offset = inode->i_size & (PAGE_SIZE - 1);
- /* no file contents in this page */
- if (page->index >= end_index + 1 || !last_offset) {
- unlock_page(page);
+ /* no file contents in this folio */
+ if (folio->index >= end_index + 1 || !last_offset) {
+ folio_unlock(folio);
return 0;
}
- zero_user_segment(page, last_offset, PAGE_SIZE);
+ folio_zero_segment(folio, last_offset, folio_size(folio));
}
bh = head;
- block = page->index << (PAGE_SHIFT - s->s_blocksize_bits);
+ block = folio->index << (PAGE_SHIFT - s->s_blocksize_bits);
last_block = (i_size_read(inode) - 1) >> inode->i_blkbits;
/* first map all the buffers, logging any direct items we find */
do {
if (block > last_block) {
/*
* This can happen when the block size is less than
- * the page size. The corresponding bytes in the page
+ * the folio size. The corresponding bytes in the folio
* were zero filled above
*/
clear_buffer_dirty(bh);
@@ -2593,7 +2592,7 @@ static int reiserfs_write_full_page(stru
* blocks we're going to log
*/
if (checked) {
- ClearPageChecked(page);
+ folio_clear_checked(folio);
reiserfs_write_lock(s);
error = journal_begin(&th, s, bh_per_page + 1);
if (error) {
@@ -2602,7 +2601,7 @@ static int reiserfs_write_full_page(stru
}
reiserfs_update_inode_transaction(inode);
}
- /* now go through and lock any dirty buffers on the page */
+ /* now go through and lock any dirty buffers on the folio */
do {
get_bh(bh);
if (!buffer_mapped(bh))
@@ -2623,7 +2622,7 @@ static int reiserfs_write_full_page(stru
lock_buffer(bh);
} else {
if (!trylock_buffer(bh)) {
- redirty_page_for_writepage(wbc, page);
+ folio_redirty_for_writepage(wbc, folio);
continue;
}
}
@@ -2640,13 +2639,13 @@ static int reiserfs_write_full_page(stru
if (error)
goto fail;
}
- BUG_ON(PageWriteback(page));
- set_page_writeback(page);
- unlock_page(page);
+ BUG_ON(folio_test_writeback(folio));
+ folio_start_writeback(folio);
+ folio_unlock(folio);
/*
- * since any buffer might be the only dirty buffer on the page,
- * the first submit_bh can bring the page out of writeback.
+ * since any buffer might be the only dirty buffer on the folio,
+ * the first submit_bh can bring the folio out of writeback.
* be careful with the buffers.
*/
do {
@@ -2663,10 +2662,10 @@ static int reiserfs_write_full_page(stru
done:
if (nr == 0) {
/*
- * if this page only had a direct item, it is very possible for
+ * if this folio only had a direct item, it is very possible for
* no io to be required without there being an error. Or,
* someone else could have locked them and sent them down the
- * pipe without locking the page
+ * pipe without locking the folio
*/
bh = head;
do {
@@ -2677,18 +2676,18 @@ done:
bh = bh->b_this_page;
} while (bh != head);
if (!partial)
- SetPageUptodate(page);
- end_page_writeback(page);
+ folio_mark_uptodate(folio);
+ folio_end_writeback(folio);
}
return error;
fail:
/*
* catches various errors, we need to make sure any valid dirty blocks
- * get to the media. The page is currently locked and not marked for
+ * get to the media. The folio is currently locked and not marked for
* writeback
*/
- ClearPageUptodate(page);
+ folio_clear_uptodate(folio);
bh = head;
do {
get_bh(bh);
@@ -2698,16 +2697,16 @@ fail:
} else {
/*
* clear any dirty bits that might have come from
- * getting attached to a dirty page
+ * getting attached to a dirty folio
*/
clear_buffer_dirty(bh);
}
bh = bh->b_this_page;
} while (bh != head);
- SetPageError(page);
- BUG_ON(PageWriteback(page));
- set_page_writeback(page);
- unlock_page(page);
+ folio_set_error(folio);
+ BUG_ON(folio_test_writeback(folio));
+ folio_start_writeback(folio);
+ folio_unlock(folio);
do {
struct buffer_head *next = bh->b_this_page;
if (buffer_async_write(bh)) {
@@ -2728,9 +2727,10 @@ static int reiserfs_read_folio(struct fi
static int reiserfs_writepage(struct page *page, struct writeback_control *wbc)
{
- struct inode *inode = page->mapping->host;
+ struct folio *folio = page_folio(page);
+ struct inode *inode = folio->mapping->host;
reiserfs_wait_on_write_block(inode->i_sb);
- return reiserfs_write_full_page(page, wbc);
+ return reiserfs_write_full_folio(folio, wbc);
}
static void reiserfs_truncate_failed_write(struct inode *inode)
_
Patches currently in -mm which might be from willy@xxxxxxxxxxxxx are
mm-make-lock_folio_maybe_drop_mmap-vma-lock-aware.patch
mm-call-wp_page_copy-under-the-vma-lock.patch
mm-handle-shared-faults-under-the-vma-lock.patch
mm-handle-cow-faults-under-the-vma-lock.patch
mm-handle-read-faults-under-the-vma-lock.patch
mm-handle-write-faults-to-ro-pages-under-the-vma-lock.patch
iomap-hold-state_lock-over-call-to-ifs_set_range_uptodate.patch
iomap-protect-read_bytes_pending-with-the-state_lock.patch
mm-add-folio_end_read.patch
ext4-use-folio_end_read.patch
buffer-use-folio_end_read.patch
iomap-use-folio_end_read.patch
bitops-add-xor_unlock_is_negative_byte.patch
alpha-implement-xor_unlock_is_negative_byte.patch
m68k-implement-xor_unlock_is_negative_byte.patch
mips-implement-xor_unlock_is_negative_byte.patch
powerpc-implement-arch_xor_unlock_is_negative_byte-on-32-bit.patch
riscv-implement-xor_unlock_is_negative_byte.patch
s390-implement-arch_xor_unlock_is_negative_byte.patch
mm-delete-checks-for-xor_unlock_is_negative_byte.patch
mm-add-folio_xor_flags_has_waiters.patch
mm-make-__end_folio_writeback-return-void.patch
mm-use-folio_xor_flags_has_waiters-in-folio_end_writeback.patch
filemap-remove-use-of-wait-bookmarks.patch
sched-remove-wait-bookmarks.patch
buffer-return-bool-from-grow_dev_folio.patch
buffer-make-folio_create_empty_buffers-return-a-buffer_head.patch
mpage-convert-map_buffer_to_folio-to-folio_create_empty_buffers.patch
ext4-convert-to-folio_create_empty_buffers.patch
buffer-add-get_nth_bh.patch
gfs2-convert-inode-unstuffing-to-use-a-folio.patch
gfs2-convert-gfs2_getbuf-to-folios.patch
gfs2-convert-gfs2_getjdatabuf-to-use-a-folio.patch
gfs2-convert-gfs2_write_buf_to_page-to-use-a-folio.patch
nilfs2-convert-nilfs_mdt_freeze_buffer-to-use-a-folio.patch
nilfs2-convert-nilfs_grab_buffer-to-use-a-folio.patch
nilfs2-convert-nilfs_copy_page-to-nilfs_copy_folio.patch
nilfs2-convert-nilfs_mdt_forget_block-to-use-a-folio.patch
nilfs2-convert-nilfs_mdt_get_frozen_buffer-to-use-a-folio.patch
nilfs2-remove-nilfs_page_get_nth_block.patch
nilfs2-convert-nilfs_lookup_dirty_data_buffers-to-use-folio_create_empty_buffers.patch
ntfs-convert-ntfs_read_block-to-use-a-folio.patch
ntfs-convert-ntfs_writepage-to-use-a-folio.patch
ntfs-convert-ntfs_prepare_pages_for_non_resident_write-to-folios.patch
ntfs3-convert-ntfs_zero_range-to-use-a-folio.patch
ocfs2-convert-ocfs2_map_page_blocks-to-use-a-folio.patch
reiserfs-convert-writepage-to-use-a-folio.patch
ufs-add-ufs_get_locked_folio-and-ufs_put_locked_folio.patch
ufs-use-ufs_get_locked_folio-in-ufs_alloc_lastblock.patch
ufs-convert-ufs_change_blocknr-to-use-folios.patch
ufs-remove-ufs_get_locked_page.patch
buffer-remove-folio_create_empty_buffers.patch
