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| author | Mike Snitzer <snitzer@redhat.com> | 2022-01-28 10:58:41 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-01-28 12:28:15 -0700 |
| commit | b879f915bc48a18d4f4462729192435bb0f17052 (patch) | |
| tree | a6872f00546c3ee5ae32a73dadc02712a7c27b65 /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | f524d9c95fab54783d0038f7a3e8c014d5b56857 (diff) | |
| download | kernel-b879f915bc48a18d4f4462729192435bb0f17052.tar.gz | |
dm: properly fix redundant bio-based IO accounting
Record the start_time for a bio but defer the starting block core's IO
accounting until after IO is submitted using bio_start_io_acct_time().
This approach avoids the need to mess around with any of the
individual IO stats in response to a bio_split() that follows bio
submission.
Reported-by: Bud Brown <bubrown@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Depends-on: e45c47d1f94e ("block: add bio_start_io_acct_time() to control start_time")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220128155841.39644-4-snitzer@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
0 files changed, 0 insertions, 0 deletions