Re: [PATCH 5/5] xfs: fold xfs_change_file_space into xfs_ioc_space

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Wed, Oct 16, 2013 at 08:47:33AM +1100, Dave Chinner wrote:
> I'll put a significant quantity of beer on the table if anyone other
> than xfstests is actually using these ioctls. In all my years of
> working with XFS, I've never seen a single user of them, even on
> Irix.
> 
> The one person I know who was considering using XFS_IOC_ALLOCSP
> convinced me (quite easily) to implement XFS_IOC_ZERO_RANGE for them
> because writing all those zeros to re-initialise pre-allocated VM
> images was going to be prohibitively expensive...
> 
> Anyway, it was just a thought.

Send a patch to warn on their usage, and you might be the lucky owner of
a beer or two a few years down the road :)