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Date: Fri, 13 Jan 2012 10:14:57 +0800
From: Jeff Liu <jeff.liu@oracle.com>
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Subject: Re: Introduce SEEK_DATA/SEEK_HOLE to XFS V5
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To: Christoph Hellwig <hch@infradead.org>
Cc: Ben Myers <bpm@sgi.com>, Mark Tinguely <tinguely@sgi.com>, Chris Mason <chris.mason@oracle.com>, xfs@oss.sgi.com

On 01/13/2012 12:39 AM, Christoph Hellwig wrote:

> On Wed, Jan 11, 2012 at 03:07:29PM -0600, Mark Tinguely wrote:
>>
>> xfs_bmapi_read() returns the br_state == XFS_EXT_NORM for a hole.
>> There are a couple places that a hole can trigger a data test.
>> BTW, I could not generate a large enough hole that xfs_bmapi_read()
>> would return as more than one hole entry, so I will ignore those
>> situations and just list the couple places that a hole may be match
>> a data rule:
> 
> We've been through this before, you need to overflow the 32-bit extent
> length counter to get there.  Jeff, did you manage to create a test
> case for that particular scenario?

Ok, I'll try it out.

Thanks,
-Jeff

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