Re: [dm-devel] Re: [PATCH-RFC] Bug in dm-raid1 as used by pvmove

[Alasdair G Kergon <agk redhat com>]

On Thu, May 18, 2006 at 11:45:09PM -0500, Jon Brassow wrote:
> I've also check to make sure that it doesn't screw anything up when 
> fault tolerance is included (see http://www.brassow.com/mirroring).  We 
> had to check to ensure that if bio_map was called (which alters the bio 
> and takes off the ti->begin) that a later function would not then call 
> the updated bio_to_region - effectively subtracting off ti->begin 
> twice.

This is a small thing I want to consider for the 'next generation' of 
device-mapper.  The dm core should be responsible for subtracting the
offset.  (Many target implementations originally forget to do this.)
 
Alasdair
-- 
agk redhat com