linux-kernel - Re: [PATCH v3 3/5] ext4: Add alignment check for DAX mount

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Message-ID: <20160509081552.GA11897@quack2.suse.cz>
Date:	Mon, 9 May 2016 10:15:52 +0200
From:	Jan Kara <jack@...e.cz>
To:	Toshi Kani <toshi.kani@....com>
Cc:	dan.j.williams@...el.com, jack@...e.cz, david@...morbit.com,
	viro@...iv.linux.org.uk, axboe@...com, hch@...radead.org,
	boaz@...xistor.com, tytso@....edu, adilger.kernel@...ger.ca,
	ross.zwisler@...ux.intel.com, micah.parrish@....com,
	linux-nvdimm@...ts.01.org, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/5] ext4: Add alignment check for DAX mount

On Thu 05-05-16 18:29:54, Toshi Kani wrote:
> When a partition is not aligned by 4KB, mount -o dax succeeds,
> but any read/write access to the filesystem fails, except for
> metadata update.
> 
> Call bdev_supports_dax() to perform proper precondition checks
> which includes this partition alignment check.
> 
> Reported-by: Micah Parrish <micah.parrish@....com>
> Signed-off-by: Toshi Kani <toshi.kani@....com>
> Cc: "Theodore Ts'o" <tytso@....edu>
> Cc: Andreas Dilger <adilger.kernel@...ger.ca>
> Cc: Jan Kara <jack@...e.cz>
> Cc: Dan Williams <dan.j.williams@...el.com>
> Cc: Ross Zwisler <ross.zwisler@...ux.intel.com>
> Cc: Christoph Hellwig <hch@...radead.org>
> Cc: Boaz Harrosh <boaz@...xistor.com>

Looks good. You can add:

Reviewed-by: Jan Kara <jack@...e.cz>

								Honza

-- 
Jan Kara <jack@...e.com>
SUSE Labs, CR