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Date: Fri, 29 Jan 2016 12:24:08 -0700
From: Ross Zwisler <ross.zwisler@linux.intel.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-block@vger.kernel.org, linux-nvdimm@ml01.01.org,
        Dave Chinner <david@fromorbit.com>, linux-kernel@vger.kernel.org,
        Christoph Hellwig <hch@lst.de>, axboe@fb.com,
        Jeff Moyer <jmoyer@redhat.com>, Jan Kara <jack@suse.com>,
        linux-fsdevel@vger.kernel.org, Matthew Wilcox <willy@linux.intel.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: Re: [PATCH 2/2] block: use DAX for partition table reads
Message-ID: <20160129192408.GD5224@linux.intel.com>
Mail-Followup-To: Ross Zwisler <ross.zwisler@linux.intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	linux-block@vger.kernel.org, linux-nvdimm@lists.01.org,
	Dave Chinner <david@fromorbit.com>, linux-kernel@vger.kernel.org,
	Christoph Hellwig <hch@lst.de>, axboe@fb.com,
	Jeff Moyer <jmoyer@redhat.com>, Jan Kara <jack@suse.com>,
	linux-fsdevel@vger.kernel.org,
	Matthew Wilcox <willy@linux.intel.com>,
	Andrew Morton <akpm@linux-foundation.org>
References: <20160129151835.18752.9423.stgit@dwillia2-desk3.amr.corp.intel.com>
 <20160129151846.18752.48460.stgit@dwillia2-desk3.amr.corp.intel.com>
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On Fri, Jan 29, 2016 at 07:18:46AM -0800, Dan Williams wrote:
> Avoid populating pagecache when the block device is in DAX mode.
> Otherwise these page cache entries collide with the fsync/msync
> implementation and break data durability guarantees.
> 
> Cc: Jan Kara <jack@suse.com>
> Cc: Jeff Moyer <jmoyer@redhat.com>
> Cc: Christoph Hellwig <hch@lst.de>
> Cc: Dave Chinner <david@fromorbit.com>
> Cc: Matthew Wilcox <willy@linux.intel.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Reported-by: Ross Zwisler <ross.zwisler@linux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

This solves the problem for me, thanks!

Tested-by: Ross Zwisler <ross.zwisler@linux.intel.com>