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

2016-05-03 Thread Waiman Long
On 05/03/2016 04:43 AM, Christoph Hellwig wrote: 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. I think the

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

2016-05-03 Thread Christoph Hellwig
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.