Re: [ATTEND] [LSF TOPIC] What to do about O_DIRECT?

[Jan Kara <jack@suse.cz>]

On Wed 06-02-13 08:51:12, Dave Chinner wrote:
> The advantage of using shared code is that it eases the burden of
> maintenance and enhancement on individual filesystems.  Both Josef
> and I are putting forward the argument that the shared direct IO
> code provides neither of those advantages any more due to current
> complexity and fragility that has resulted from the monolithic
> "everything for everyone" approach we currently have.
> 
> What I'm trying to say is that maybe there's a better way of
> providing generic direct IO support. Perhaps we are better served by
> having smaller generic helpers similar to the buffered IO path to
> allow filesystems to the simple stuff as optimally as possible
> without all the overhead they don't need. One-size-fits-all has
> never worked in the filesystems game, yet we seem to be stuck on
> that approach here even when it appears to be collapsing under it's
> own weight.... :/
  Yeah, the approach of providing smaller generic helpers could make the
code more readable so I guess it's worth a try.

								Honza
-- 
Jan Kara <jack@suse.cz>
SUSE Labs, CR