[dm-devel] [PATCH for-4.2 2/3] block, dm: don't copy bios for request clones

[Christoph Hellwig]

On Tue, May 26, 2015 at 06:20:43AM +0000, Junichi Nomura wrote:
> Not completing bios is not sufficient.
> If you advance the bi_iter to the end, you need to somehow rewind it
> or the re-submission will be incomplete, that would end up as a data
> corruption...

Can you explain which particular case you're worried about?