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

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Message-ID: <20170208193832.zydlsh64ieage2js@thunk.org>
Date:   Wed, 8 Feb 2017 14:38:32 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@....de>,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-nvdimm@...1.01.org
Subject: Re: [PATCH 1/2] ext4: fix DAX write locking

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@....de>
> > 
> > Makes sense. You can add:
> > 
> > Reviewed-by: Jan Kara <jack@...e.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