In f2fs_preallocate_blocks(), if it is partial write in 4KB, it's not
necessary to call f2fs_map_blocks() and set FI_PREALLOCATED_ALL flag.
Cc: Eric Biggers <ebigg...@google.com>
Signed-off-by: Chao Yu <c...@kernel.org>
---
fs/f2fs/file.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 5c2f99ada6be..1a3c29a9a6a0 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4561,13 +4561,14 @@ static int f2fs_preallocate_blocks(struct kiocb *iocb,
struct iov_iter *iter,
return ret;
}
- /* Do not preallocate blocks that will be written partially in 4KB. */
map.m_lblk = F2FS_BLK_ALIGN(pos);
map.m_len = F2FS_BYTES_TO_BLK(pos + count);
- if (map.m_len > map.m_lblk)
- map.m_len -= map.m_lblk;
- else
- map.m_len = 0;
+
+ /* Do not preallocate blocks that will be written partially in 4KB. */
+ if (map.m_len <= map.m_lblk)
+ return 0;
+
+ map.m_len -= map.m_lblk;
map.m_may_create = true;
if (dio) {
map.m_seg_type = f2fs_rw_hint_to_seg_type(inode->i_write_hint);
--
2.40.1
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