Re: [PATCH v4 5/7] fs: prioritize and separate direct_io from dax_io

[h...@infradead.org]

On Thu, May 05, 2016 at 09:39:14PM +0000, Verma, Vishal L wrote:
> How is it any 'less direct'? All it does now is follow the blockdev
> O_DIRECT path. There still isn't any page cache involved..

It's still more overhead than the play DAX I/O path.