diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-11-05 14:24:09 -0400 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2021-12-18 00:06:07 -0500 |
| commit | a25def1fe56858efa40a8490e875da4a711487f8 (patch) | |
| tree | e29401aa007c42efa8962aef16637ab4c5f81109 /fs/iomap | |
| parent | d454ab82bc7f4aa7af9f539d5cf9a1e237cdcbc2 (diff) | |
iomap: Convert __iomap_zero_iter to use a folio
The zero iterator can work in folio-sized chunks instead of page-sized
chunks. This will save a lot of page cache lookups if the file is cached
in large folios.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Diffstat (limited to 'fs/iomap')
| -rw-r--r-- | fs/iomap/buffered-io.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index b1ded5204d1c..47cf558244f4 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -893,19 +893,23 @@ EXPORT_SYMBOL_GPL(iomap_file_unshare); static s64 __iomap_zero_iter(struct iomap_iter *iter, loff_t pos, u64 length) { + struct folio *folio; struct page *page; int status; - unsigned offset = offset_in_page(pos); + size_t offset; unsigned bytes = min_t(u64, UINT_MAX, length); status = iomap_write_begin(iter, pos, bytes, &page); if (status) return status; - if (bytes > PAGE_SIZE - offset) - bytes = PAGE_SIZE - offset; + folio = page_folio(page); + + offset = offset_in_folio(folio, pos); + if (bytes > folio_size(folio) - offset) + bytes = folio_size(folio) - offset; - zero_user(page, offset, bytes); - mark_page_accessed(page); + folio_zero_range(folio, offset, bytes); + folio_mark_accessed(folio); return iomap_write_end(iter, pos, bytes, bytes, page); } |