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Date: Fri, 22 Nov 2013 06:20:22 -0800
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH RFC] xfs: set block device logical sector size on
	xfs_buftarg
Message-ID: <20131122142022.GC14680@infradead.org>
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To: Ric Wheeler <rwheeler@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>, Eric Sandeen <sandeen@sandeen.net>, xfs-oss <xfs@oss.sgi.com>, Eric Sandeen <sandeen@redhat.com>

On Fri, Nov 22, 2013 at 09:13:56AM -0500, Ric Wheeler wrote:
> I think you do that by using SCSI debug to get a 4K sector drive -
> that is how we tested for RHEL6 for example.  Layering on
> restrictions to hardware in the file system seems a bit harsh.
> 
> The QEMU crowd will be working to get better support for 4K drives
> in the future, but I think that we are effectively going to cause a
> huge field issue here since these 512/4K drives are extremely
> common..
> 
> Given the SCSI debug method for this, does that mean you retract
> your objections and will support Eric's patch :) ?

We actually have a test for 4k drives using scsi_debug in xfstests: xfs/279.

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