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nilfs: Convert nilfs_set_page_dirty() to nilfs_dirty_folio()

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The comment about the page always being locked is wrong, so copy
the locking protection from __set_page_dirty_buffers().  That
means moving the call to nilfs_set_file_dirty() down the
function so as to not acquire a new dependency between the
mapping->private_lock and the ns_inode_lock.  That might be a
harmless dependency to add, but it's not necessary.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Acked-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Mike Marshall <hubcap@omnibond.com> # orangefs
Tested-by: David Howells <dhowells@redhat.com> # afs
This commit is contained in:
Matthew Wilcox (Oracle) 2022-02-09 20:22:11 +00:00
parent 7e63df00cf
commit af7afdc7bb
1 changed files with 19 additions and 21 deletions
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40
fs/nilfs2/inode.c
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@ -199,23 +199,22 @@ static int nilfs_writepage(struct page *page, struct writeback_control *wbc)
return 0;
}
static int nilfs_set_page_dirty(struct page *page)
static bool nilfs_dirty_folio(struct address_space *mapping,
struct folio *folio)
{
struct inode *inode = page->mapping->host;
int ret = __set_page_dirty_nobuffers(page);
struct inode *inode = mapping->host;
struct buffer_head *head;
unsigned int nr_dirty = 0;
bool ret = filemap_dirty_folio(mapping, folio);
if (page_has_buffers(page)) {
unsigned int nr_dirty = 0;
struct buffer_head *bh, *head;
/*
* The page may not be locked, eg if called from try_to_unmap_one()
*/
spin_lock(&mapping->private_lock);
head = folio_buffers(folio);
if (head) {
struct buffer_head *bh = head;
/*
* This page is locked by callers, and no other thread
* concurrently marks its buffers dirty since they are
* only dirtied through routines in fs/buffer.c in
* which call sites of mark_buffer_dirty are protected
* by page lock.
*/
bh = head = page_buffers(page);
do {
/* Do not mark hole blocks dirty */
if (buffer_dirty(bh) || !buffer_mapped(bh))
@ -224,14 +223,13 @@ static int nilfs_set_page_dirty(struct page *page)
set_buffer_dirty(bh);
nr_dirty++;
} while (bh = bh->b_this_page, bh != head);
if (nr_dirty)
nilfs_set_file_dirty(inode, nr_dirty);
} else if (ret) {
unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
nilfs_set_file_dirty(inode, nr_dirty);
nr_dirty = 1 << (folio_shift(folio) - inode->i_blkbits);
}
spin_unlock(&mapping->private_lock);
if (nr_dirty)
nilfs_set_file_dirty(inode, nr_dirty);
return ret;
}
@ -299,7 +297,7 @@ const struct address_space_operations nilfs_aops = {
.writepage = nilfs_writepage,
.readpage = nilfs_readpage,
.writepages = nilfs_writepages,
.set_page_dirty = nilfs_set_page_dirty,
.dirty_folio = nilfs_dirty_folio,
.readahead = nilfs_readahead,
.write_begin = nilfs_write_begin,
.write_end = nilfs_write_end,