[PATCH 2/3] xfs: clear XFS_IDIRTY_RELEASE on truncate down

[Christoph Hellwig]

On Thu, Jun 23, 2011 at 11:35:00AM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner at redhat.com>
> 
> When an inode is truncated down, speculative preallocation is
> removed from the inode. This should also reset the state bits for
> controlling whether preallocation is subsequently removed when the
> file is next closed. The flag is not being cleared, so repeated
> operations on a file that first involve a truncate (e.g. multiple
> repeated dd invocations on a file) give different file layouts for
> the second and subsequent invocations.
> 
> Fix this by clearing the XFS_IDIRTY_RELEASE state bit when the
> XFS_ITRUNCATED bit is detected in xfs_release() and hence ensure
> that speculative delalloc is removed on files that have been
> truncated down.
> 
> Signed-off-by: Dave Chinner <dchinner at redhat.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>