From: Zhang Yi yi.zhang@huawei.com
hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I9DN5Z CVE: NA
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When overwriting an already uptodate folio, we don't need to set the range uptodate again. This could save a barrier and some bit operations if block size < folio size.
Suggested-by: Matthew Wilcox willy@infradead.org Signed-off-by: Zhang Yi yi.zhang@huawei.com Conflicts: fs/iomap/buffered-io.c [ 15d09f865dc4("iomap: export __iomap_write_{begin|end}") is applied. ] Signed-off-by: Zhihao Cheng chengzhihao1@huawei.com Signed-off-by: Zhihao Cheng chengzhihao@huaweicloud.com --- fs/iomap/buffered-io.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 414b7bdde787..09f410f5d637 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -916,7 +916,12 @@ bool __iomap_write_end(struct inode *inode, loff_t pos, size_t len, if (unlikely(copied < len && !folio_test_uptodate(folio))) return false;
- iomap_set_range_dirty_uptodate(folio, from, copied); + if (folio_test_uptodate(folio)) { + iomap_set_range_dirty(folio, from, copied); + filemap_dirty_folio(folio->mapping, folio); + } else { + iomap_set_range_dirty_uptodate(folio, from, copied); + } return true; } EXPORT_SYMBOL_GPL(__iomap_write_end);