[PATCH, RFC] default to inode64 on 64-bit systems

[Christoph Hellwig]

On Mon, Jul 06, 2009 at 01:25:34PM -0500, Eric Sandeen wrote:
> I'm tiring of telling people to use the inode64 mount option
> when they are experiencing bad performance on large xfs 
> filesystems...
> 
> 32-bit userspace is still largely broken when it comes to still
> using 32-bit stat calls, but on 64-bit systems this should be
> safe.
> 
> The only problem here is moving the disk onto a 32-bit system, or using
> 32-bit apps.  But I think it's a small risk.
> 
> What do we think about the following?

Looks good to me, but it could use a comment in the code explaining why
we do this.