On Sunday June 24, npiggin@xxxxxxx wrote: > > +#define PG_blocks 20 /* Page has block mappings */ > + I've only had a very quick look, but this line looks *very* wrong. You should be using PG_private. There should never be any confusion about whether ->private has buffers or blocks attached as the only routines that ever look in ->private are address_space operations (or should be. I think 'NULL' is sometimes special cased, as in try_to_release_page. It would be good to do some preliminary work and tidy all that up). Why do you think you need PG_blocks? NeilBrown - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html