Re: [PATCH 43/63] xfs: teach get_bmapx about shared extents and the CoW fork

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On Fri, Sep 30, 2016 at 10:18:53AM +1000, Dave Chinner wrote:
> On Thu, Sep 29, 2016 at 12:51:12PM -0700, Christoph Hellwig wrote:
> > On Thu, Sep 29, 2016 at 10:40:59AM -0700, Darrick J. Wong wrote:
> > > There are a few xfstests that check the contents of the CoW extent fork
> > > to make sure it's working properly.  How about a compromise -- leave the
> > > flag in, but return -EINVAL unless CONFIG_XFS_DEBUG=y ?
> > 
> > Personally I'd prefer to remove it.  Maybe we'll need Dave as a tie
> > breaker?
> 
> Well, I kinda see it like reporting delalloc extents - they are
> in-memory, but we can report them to userspace even though they will
> change shortly.  I don't think it's generally useful, but right now
> we need all the validation checks we can get.
> 
> <shrug>
> 
> Ok, Darrick, let's make it debug only right now so those tests work
> while we get this code all sorted. And then plan to remove it before
> we remove the EXPERIMENTAL flag from reflink?

Sounds fine with me.

--D

> 
> Cheers,
> 
> Dave.
> -- 
> Dave Chinner
> david@xxxxxxxxxxxxx
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