ext4: Use direct_IO_no_locking in ext4 dio read

Signed-off-by: Jiaying Zhang <jiayingz@google.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 8 insertions, 1 deletions

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d291310aef6b..92214d4e5afa 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3474,7 +3474,14 @@ static ssize_t ext4_ind_direct_IO(int rw, struct kiocb *iocb,
         }
 
 retry:
-        ret = blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+        if (rw == READ && ext4_should_dioread_nolock(inode))
+                ret = blockdev_direct_IO_no_locking(rw, iocb, inode,
+                                 inode->i_sb->s_bdev, iov,
+                                 offset, nr_segs,
+                                 ext4_get_block, NULL);
+        else
+                ret = blockdev_direct_IO(rw, iocb, inode,
+                                 inode->i_sb->s_bdev, iov,
                                  offset, nr_segs,
                                  ext4_get_block, NULL);
         if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))