Re: [PATCH 0/4][RFC] remove duplicated check from ext4, xfs, btrfs, and ocfs2

[Zheng Liu <gnehzuil.liu@xxxxxxxxx>]

On Tue, Nov 20, 2012 at 05:14:53AM -0500, Christoph Hellwig wrote:
> On Tue, Nov 20, 2012 at 05:29:41PM +0800, Zheng Liu wrote:
> > Hi all,
> > 
> > This patch series tries to remove a sanity check in fallocate from specific
> > filesystems because vfs has already checked it.
> > 
> > I am not very familiar with why we need to do this duplicated check.  
> > Please let
> > me know if I miss something.
> 
> Each filesystem driver checks to see if a flag that it doesn't support
> gets passed down.  This was done with the intention that we can add new
> flags to the VFS without having to update every filesystem.

Thanks for your explanation.

Regards,
                                                - Zheng