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Diffstat (limited to 'fs/ocfs2/file.c')
-rw-r--r--fs/ocfs2/file.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 5d384a6cd696..38fc33922832 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2271,6 +2271,8 @@ static ssize_t ocfs2_file_write_iter(struct kiocb *iocb,
OCFS2_MOUNT_COHERENCY_BUFFERED);
int unaligned_dio = 0;
int dropped_dio = 0;
+ int append_write = ((iocb->ki_pos + count) >=
+ i_size_read(inode) ? 1 : 0);
trace_ocfs2_file_aio_write(inode, file, file->f_path.dentry,
(unsigned long long)OCFS2_I(inode)->ip_blkno,
@@ -2290,8 +2292,9 @@ relock:
/*
* Concurrent O_DIRECT writes are allowed with
* mount_option "coherency=buffered".
+ * For append write, we must take rw EX.
*/
- rw_level = (!direct_io || full_coherency);
+ rw_level = (!direct_io || full_coherency || append_write);
ret = ocfs2_rw_lock(inode, rw_level);
if (ret < 0) {