Re: [PATCH v2 2/9] ext2: tell DAX the size of allocation holes

[Christoph Hellwig]

On Sat, Sep 10, 2016 at 07:33:18AM +0000, Matthew Wilcox wrote:
> > caller specific is unaceptable.  That being said your idea doesn't sounds
> > unreasonable, but will require a bit more work and has no real short-term
> > need.
> 
> So your proposal is to remove buffer_heads from ext2?

No, the proposal is to remove buffer_heads from XFS first, then GFS2
and then maybe others like ext4.  I'd like to remove buffer_heads from
the DAX path for ext2 and ext4 entitrely for sure (and direct I/O next).