Re: [PATCH] dm-thin: Fix multiple bugs with reference management

[Joe Thornber <thornber@redhat.com>]

On Mon, Sep 12, 2011 at 12:03:31PM -0400, Mikulas Patocka wrote:
> Hi
> 
> This is a major cleanup+bugfix of reference count management. Test it with 
> your testsuite.

Right, we've got 2 patches here really.

The first replaces a spinlock with a mutex and lifts it to remove a
couple of race conditions.  All good, I've prefixed the functions that
should be called with this lock held with '__' as usual.

The second moves registration to the constructor and destructor rather
than suspend/resume.  I know you were asking about this earlier, and I
think this was a hang over from when the pool and target objects were
the same thing, and we couldn't have two targets registered at once
when reloading a table.  Your change is clearly simpler.

All tests pass.  Merged and pushed.

Thanks,

- Joe