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nilfs2: convert nilfs_copy_page() to nilfs_copy_folio() 

Both callers already have a folio, so pass it in and use it directly. 
Removes a lot of hidden calls to compound_head().

Link: https://lkml.kernel.org/r/20231016201114.1928083-13-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-10-16 21:10:59 +01:00 committed by Andrew Morton
parent c5521c7689
commit 4093602d6b
2 changed files with 27 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
fs/nilfs2/page.c
View File

@ -184,30 +184,32 @@ void nilfs_page_bug(struct page *page)
}
/**
* nilfs_copy_page -- copy the page with buffers
* @dst: destination page
* @src: source page
* @copy_dirty: flag whether to copy dirty states on the page's buffer heads.
* nilfs_copy_folio -- copy the folio with buffers
* @dst: destination folio
* @src: source folio
* @copy_dirty: flag whether to copy dirty states on the folio's buffer heads.
*
* This function is for both data pages and btnode pages. The dirty flag
* should be treated by caller. The page must not be under i/o.
* Both src and dst page must be locked
* This function is for both data folios and btnode folios. The dirty flag
* should be treated by caller. The folio must not be under i/o.
* Both src and dst folio must be locked
*/
static void nilfs_copy_page(struct page *dst, struct page *src, int copy_dirty)
static void nilfs_copy_folio(struct folio *dst, struct folio *src,
bool copy_dirty)
{
struct buffer_head *dbh, *dbufs, *sbh;
unsigned long mask = NILFS_BUFFER_INHERENT_BITS;
BUG_ON(PageWriteback(dst));
BUG_ON(folio_test_writeback(dst));
sbh = page_buffers(src);
if (!page_has_buffers(dst))
create_empty_buffers(dst, sbh->b_size, 0);
sbh = folio_buffers(src);
dbh = folio_buffers(dst);
if (!dbh)
dbh = folio_create_empty_buffers(dst, sbh->b_size, 0);
if (copy_dirty)
mask |= BIT(BH_Dirty);
dbh = dbufs = page_buffers(dst);
dbufs = dbh;
do {
lock_buffer(sbh);
lock_buffer(dbh);
@ -218,16 +220,16 @@ static void nilfs_copy_page(struct page *dst, struct page *src, int copy_dirty)
dbh = dbh->b_this_page;
} while (dbh != dbufs);
copy_highpage(dst, src);
folio_copy(dst, src);
if (PageUptodate(src) && !PageUptodate(dst))
SetPageUptodate(dst);
else if (!PageUptodate(src) && PageUptodate(dst))
ClearPageUptodate(dst);
if (PageMappedToDisk(src) && !PageMappedToDisk(dst))
SetPageMappedToDisk(dst);
else if (!PageMappedToDisk(src) && PageMappedToDisk(dst))
ClearPageMappedToDisk(dst);
if (folio_test_uptodate(src) && !folio_test_uptodate(dst))
folio_mark_uptodate(dst);
else if (!folio_test_uptodate(src) && folio_test_uptodate(dst))
folio_clear_uptodate(dst);
if (folio_test_mappedtodisk(src) && !folio_test_mappedtodisk(dst))
folio_set_mappedtodisk(dst);
else if (!folio_test_mappedtodisk(src) && folio_test_mappedtodisk(dst))
folio_clear_mappedtodisk(dst);
do {
unlock_buffer(sbh);
@ -269,7 +271,7 @@ repeat:
NILFS_PAGE_BUG(&folio->page,
"found empty page in dat page cache");
nilfs_copy_page(&dfolio->page, &folio->page, 1);
nilfs_copy_folio(dfolio, folio, true);
filemap_dirty_folio(folio_mapping(dfolio), dfolio);
folio_unlock(dfolio);
@ -314,7 +316,7 @@ repeat:
if (!IS_ERR(dfolio)) {
/* overwrite existing folio in the destination cache */
WARN_ON(folio_test_dirty(dfolio));
nilfs_copy_page(&dfolio->page, &folio->page, 0);
nilfs_copy_folio(dfolio, folio, false);
folio_unlock(dfolio);
folio_put(dfolio);
/* Do we not need to remove folio from smap here? */

1
mm/util.c
View File

@ -799,6 +799,7 @@ void folio_copy(struct folio *dst, struct folio *src)
cond_resched();
}
}
EXPORT_SYMBOL(folio_copy);
int sysctl_overcommit_memory __read_mostly = OVERCOMMIT_GUESS;
int sysctl_overcommit_ratio __read_mostly = 50;