block: cleanup tracing

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A couple tweaks to the tracing code:

 - trace the request size for all requests
 - trace request sector and nr_sectors only for fs requests, enforced by
   helpers
 - drop SCSI CDB tracing - we have SCSI tracing for this and are going
   to me the CDB out of the generic struct request soon.

With this the tracing code stops to know about BLOCK_PC requests entirely,
it's just FS vs passthrough requests now, where the latter includes any
driver-private requests.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

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Christoph Hellwig 2017-01-27 09:35:54 +01:00 • committed by Jens Axboe

parent 6d247d7f71

commit 48b77ad608

3 changed files with 24 additions and 60 deletions

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18

include/linux/blktrace_api.h

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27

include/trace/events/block.h

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