linux-kernel - Re: [PATCH 2/2] block: use DAX for partition table reads

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Message-ID: <20160129192408.GD5224@linux.intel.com>
Date:	Fri, 29 Jan 2016 12:24:08 -0700
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Dan Williams <dan.j.williams@...el.com>
Cc:	linux-block@...r.kernel.org, linux-nvdimm@...ts.01.org,
	Dave Chinner <david@...morbit.com>,
	linux-kernel@...r.kernel.org, Christoph Hellwig <hch@....de>,
	axboe@...com, Jeff Moyer <jmoyer@...hat.com>,
	Jan Kara <jack@...e.com>, linux-fsdevel@...r.kernel.org,
	Matthew Wilcox <willy@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: Re: [PATCH 2/2] block: use DAX for partition table reads

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@...e.com>
> Cc: Jeff Moyer <jmoyer@...hat.com>
> Cc: Christoph Hellwig <hch@....de>
> Cc: Dave Chinner <david@...morbit.com>
> Cc: Matthew Wilcox <willy@...ux.intel.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Reported-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>

This solves the problem for me, thanks!

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