Darren, I believe the exception would be zil blocks.
Thanks, George Darren J Moffat wrote: > George Wilson wrote: >> >> Darren J Moffat wrote: >>> I've been hoping to use elements of the blkptr_t as the initalisation >>> vector (IV) for the AES crypto algorithms - specifically the offset >>> and blk_birth. When do these get filled in ? >> >> This happens during the allocate phase of the pipeline (either >> zio_dva_allocate or zio_write_allocate_gang_members). The value will >> be set to whatever zio->io_txg holds. > > Are there any possible cases where the blk_birth will not be io_txg once > it is written out to disk ? >
