On 01/17/2017 01:57 PM, Jeff Moyer wrote: > Only a few bio-based drivers actually generate blktrace completion > (C) events. Instead of changing all bio-based drivers to call > trace_block_bio_complete, move the tracing to bio_complete, and remove > the explicit tracing from the few drivers that actually do it. After > this patch, there is exactly one caller of trace_block_bio_complete > and one caller of trace_block_rq_complete. More importantly, all > bio-based drivers now generate C events, which is useful for > performance analysis.
I like the change, hate the naming. I'd prefer one of two things: - Add bio_endio_complete() instead. That name sucks too, the important part is flipping the __name() to have a trace version instead. - Mark the bio as trace completed, and keep the naming. Since it's only off the completion path, that can be just marking the bi_flags non-atomically. I probably prefer the latter. -- Jens Axboe
