Re: [dm-devel] [PATCH 3/5] dm: relax ordering of bio-based flush implementation

[Tejun Heo <tj kernel org>]

On 09/01/2010 03:51 PM, Mike Snitzer wrote:
> Could you please document why it is OK to remove 'flush_error' in the
> patch header?  The -EOPNOTSUPP handling removal (done in patch 2)
> obviously helps enable this but it is not clear how the
> 'num_flush_requests' flushes that __clone_and_map_flush() generates do
> not need explicit DM error handling.

Sure, I'll.  It's because it now uses the same error handling path in
dec_pending() all other bio's use.  The flush_error thing was there
because flushes got executed/completed in a separate code path to
begin with.  With the special path gone, there's no need for
flush_error path either.

Thanks.

-- 
tejun