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Date: Tue, 3 May 2016 01:43:43 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Waiman Long <Waiman.Long@hpe.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>, Andreas Dilger <adilger.kernel@dilger.ca>,
        linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org,
        Christoph Hellwig <hch@infradead.org>,
        Scott J Norton <scott.norton@hpe.com>,
        Douglas Hatch <doug.hatch@hpe.com>
Subject: Re: [RFC PATCH] ext4: Don't release mutex for DAX write
Message-ID: <20160503084343.GA31363@infradead.org>
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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.