Re: [vfs PATCH v3 1/4] VFS: move iomap from exportfs.h to iomap.h

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On Wed, Mar 30, 2016 at 09:20:36AM +1100, Dave Chinner wrote:
> QA over the past couple of days has indicatedno regressions, so I'm
> going to seriously consider the multipage write code for the next
> XFS merge. I'd be happy to also take fiemap code based on the same
> iomap interfaces, especially if we can make it a generic, fully
> functional fiemap implementation and use it in XFS, too.

Now that's I've spent some more time with it: it depend on your
idea of fully functional.  For the actual file data the fiemap
implementation is simple and beautiful.  But XFS also supports the
odd FIEMAP_FLAG_XATTR flags, which makes no sense at all for an
fiemap based implementation.
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