commit: 721e3eba21e43532e438652dd8f1fcdfce3187e7 From: Theodore Ts'o <[email protected]> Date: Thu, 27 Dec 2012 01:42:48 -0500 Subject: ext4: lock i_mutex when truncating orphan inodes
Commit c278531d39 added a warning when ext4_flush_unwritten_io() is called without i_mutex being taken. It had previously not been taken during orphan cleanup since races weren't possible at that point in the mount process, but as a result of this c278531d39, we will now see a kernel WARN_ON in this case. Take the i_mutex in ext4_orphan_cleanup() to suppress this warning. Reported-by: Alexander Beregalov <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Reviewed-by: Zheng Liu <[email protected]> Cc: [email protected] --- fs/ext4/super.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 183ae34..3d4fb81 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -2220,7 +2220,9 @@ static void ext4_orphan_cleanup(struct super_block *sb, __func__, inode->i_ino, inode->i_size); jbd_debug(2, "truncating inode %lu to %lld bytes\n", inode->i_ino, inode->i_size); + mutex_lock(&inode->i_mutex); ext4_truncate(inode); + mutex_unlock(&inode->i_mutex); nr_truncates++; } else { ext4_msg(sb, KERN_DEBUG, -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
