[dm-devel] Re: [PATCH] dm-rwlock.patch (Re: 2.6.4-rc1-mm1: queue-congestion-dm-implementation patch)

[Miquel van Smoorenburg <miquels cistron nl>]

On Mon, 08 Mar 2004 21:19:54, Joe Thornber wrote:
> On Mon, Mar 08, 2004 at 08:12:18PM +0100, Miquel van Smoorenburg wrote:
> > I also wasn't sure how bad it is for md->map to change during
> > dm_request. With your patch, __split_bio() has a pointer to a
> > refcounted copy of the table in ci.map, but multiple calls to
> > __split_bio from the same dm_request could still end up with
> > different maps, which could be bad (I don't know).
> 
> No, dm_request() only calls __dm_request() and hence __split_bio()
> once.

Ofcourse you're right. I was thinking of __map_bio(), which is called
several times, but it doesn't take a table as argument ofcourse.

Mike.