On Wed, Mar 22, 2017 at 01:38:09PM +1100, NeilBrown wrote: > > Currently only dm and md/raid5 bios trigger trace_block_bio_complete(). > Now that we have bio_chain(), it is not possible, in general, for a > driver to know when the bio is really complete. Only bio_endio() > knows that. > > So move the trace_block_bio_complete() call to bio_endio(). This will cause duplicate events for request based drivers. You'll need to have a bio_endio_notrace or similar without that the request completion path can call.
