Re: [RFC PATCH] ext4: Don't release mutex for DAX write

From: Christoph Hellwig
Date: Tue May 03 2016 - 04:43:54 EST

As explained in another thread I really think we need to get DAX
to stop pretending to be direct I/O, which should also take care
of the locking. The same issue also exists for ext2 and XFS so it
needs to be solved at a higher level.