Re: [PATCH] block: trace completion of all bios.

2017-03-23 Thread NeilBrown
On Wed, Mar 22 2017, Christoph Hellwig wrote: > 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

Re: [PATCH] block: trace completion of all bios.

2017-03-22 Thread Christoph Hellwig
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 mov