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| author | Hengqi Chen <hengqi.chen@gmail.com> | 2023-05-20 11:40:57 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-05-24 17:38:59 +0300 |
| commit | 5a80bd075f3bce24793ae1aeb06066895ec5aef0 (patch) | |
| tree | 55ba9c3be2d53893e59f33f5dfba04818141fa25 /include/trace/events/block.h | |
| parent | a13bd91be22318768d55470cbc0b0f4488ef9edf (diff) | |
| download | linux-5a80bd075f3bce24793ae1aeb06066895ec5aef0.tar.xz | |
block: introduce block_io_start/block_io_done tracepoints
Currently, several BCC ([0]) tools (biosnoop/biostacks/biotop) use
kprobes to blk_account_io_start/blk_account_io_done to implement
their functionalities. This is fragile because the target kernel
functions may be renamed ([1]) or inlined ([2]). So introduce two
new tracepoints for such use cases.
[0]: https://github.com/iovisor/bcc
[1]: https://github.com/iovisor/bcc/issues/3954
[2]: https://github.com/iovisor/bcc/issues/4261
Tested-by: Francis Laniel <flaniel@linux.microsoft.com>
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Tested-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20230520084057.1467003-1-hengqi.chen@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/trace/events/block.h')
| -rw-r--r-- | include/trace/events/block.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/trace/events/block.h b/include/trace/events/block.h index 7f4dfbdf12a6..40e60c33cc6f 100644 --- a/include/trace/events/block.h +++ b/include/trace/events/block.h @@ -246,6 +246,32 @@ DEFINE_EVENT(block_rq, block_rq_merge, ); /** + * block_io_start - insert a request for execution + * @rq: block IO operation request + * + * Called when block operation request @rq is queued for execution + */ +DEFINE_EVENT(block_rq, block_io_start, + + TP_PROTO(struct request *rq), + + TP_ARGS(rq) +); + +/** + * block_io_done - block IO operation request completed + * @rq: block IO operation request + * + * Called when block operation request @rq is completed + */ +DEFINE_EVENT(block_rq, block_io_done, + + TP_PROTO(struct request *rq), + + TP_ARGS(rq) +); + +/** * block_bio_complete - completed all work on the block operation * @q: queue holding the block operation * @bio: block operation completed |