This reverts commit e5465795cac4 ("ext4: fix off-by-one error when
writing back pages before dio read").
It is related to the following revert 16c54688592c ("ext4: Allow
parallel DIO reads") which causes significant performance regression in
mixed random read/write scenario.
Signed-off-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
---
fs/ext4/inode.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0f505f0..16077ec 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3875,7 +3875,7 @@ static ssize_t ext4_direct_IO_read(struct kiocb *iocb, struct iov_iter *iter)
*/
inode_lock_shared(inode);
ret = filemap_write_and_wait_range(mapping, iocb->ki_pos,
- iocb->ki_pos + count - 1);
+ iocb->ki_pos + count);
if (ret)
goto out_unlock;
ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
--
1.8.3.1
