[PATCH 06/10] xfs: simplify xfs_map_blocks

[Dave Chinner]

On Mon, Nov 22, 2010 at 08:05:12AM -0500, Christoph Hellwig wrote:
> No need to lock the extent map exclusive when performing an overwrite,
> we know the extent map must already have been loaded by get_blocks.
> Apply the non-blocking inode semantics to all mapping types instead of
> just delayed allocations.  Remove the handling of not yet allocated
> blocks for the IO_UNWRITTEN case - if an extent is marked as delayed
> allocated in the buffer it must already have an extent on disk.

I think your meant "marked as unwritten in the buffer" there.

> Add asserts to verify all the assumptions above in debug builds.

Nice - I would have asked that to be added ;)

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

Looks good. It is much simpler now.

Reviewed-by: Dave Chinner <dchinner at redhat.com>

-- 
Dave Chinner
david at fromorbit.com