Re: [PATCH 1/2] ext4: fix DAX write locking

Theodore Ts'o
2017-02-08T19:38:32Z

On Wed, Feb 08, 2017 at 09:14:10AM -0800, Christoph Hellwig wrote:
> On Wed, Jan 11, 2017 at 10:01:36AM +0100, Jan Kara wrote:
> > On Tue 10-01-17 16:48:07, Christoph Hellwig wrote:
> > > Unlike O_DIRECT DAX is not an optional opt-in feature selected by the
> > > application, so we'll have to provide the traditional synchronіzation
> > > of overlapping writes as we do for buffered writes.
> > >
> > > This was broken historically for DAX, but got fixed for ext2 and XFS
> > > as part of the iomap conversion. Fix up ext4 as well.
> > >
> > > Signed-off-by: Christoph Hellwig <hch@lst.de>
> >
> > Makes sense. You can add:
> >
> > Reviewed-by: Jan Kara <jack@suse.cz>
> >
> > Ted, can you please pick it up? Thanks!
>
> Did this get picked up?

Sorry, I missed Jan's request to pick it up. I had assumed it would
be going in via the dax tree. I'll take a look at it now for the ext4
tree.

- Ted

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