[dm-devel] [PATCH] DM data integrity support

[Jens Axboe]

On Fri, Oct 24 2008, Martin K. Petersen wrote:
> agk> Perhaps change the register/unregister interface to make it
> agk> symmetric: we always register and unregister when creating the
> agk> device, then set the integrity to the appropriate value - which
> agk> might include NULL - when the new table is put into place.
> 
> It seemed wasteful to register profiles since 99%+ of all storage
> devices out there that don't have a need for them.  That's why I
> deferred the allocation.  But I guess mere mortals compile without
> BLK_DEV_INTEGRITY anyway so it may not matter that much...
> 
> Jens, what do you think?

I agree, plus there are going to be lots of users running a
BLK_DEV_INTEGRITY enabled kernel but not having the hardware (distros).
So lazy alloc makes sense.

-- 
Jens Axboe