linux-kernel - Re: [PATCH V7 3/9] fs/stat: Define DAX statx attribute

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Message-ID: <20200414203912.GA1982089@iweiny-DESK2.sc.intel.com>
Date:   Tue, 14 Apr 2020 13:39:12 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-kernel@...r.kernel.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Dave Chinner <dchinner@...hat.com>, Jan Kara <jack@...e.cz>,
        Dan Williams <dan.j.williams@...el.com>,
        Dave Chinner <david@...morbit.com>,
        "Theodore Y. Ts'o" <tytso@....edu>, Jeff Moyer <jmoyer@...hat.com>,
        linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH V7 3/9] fs/stat: Define DAX statx attribute

On Tue, Apr 14, 2020 at 08:23:06AM +0200, Christoph Hellwig wrote:
> On Sun, Apr 12, 2020 at 10:40:40PM -0700, ira.weiny@...el.com wrote:
> > STATX_ATTR_DAX
> > 
> > 	The file is in the DAX (cpu direct access) state.  DAX state
> > 	attempts to minimize software cache effects for both I/O and
> > 	memory mappings of this file.  It requires a file system which
> > 	has been configured to support DAX.
> 
> Can we remove the misleading DAX name?  Something like
> STATX_ATTR_DIRECT_LOAD_STORE?

This is easy enough to change but...

Honestly I feel like this ship has already sailed.  We have so much out there
which uses the term "DAX".  Is it really better to introduce a new terminology
for the same thing?

Ira