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blockjob: Track job ratelimits via bytes, not sectors

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The user interface specifies job rate limits in bytes/second.
It's pointless to have our internal representation track things
in sectors/second, particularly since we want to move away from
sector-based interfaces.

Fix up a doc typo found while verifying that the ratelimit
code handles the scaling difference.

Repetition of expressions like 'n * BDRV_SECTOR_SIZE' will be
cleaned up later when functions are converted to iterate over
images by bytes rather than by sectors.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2017-07-07 07:44:39 -05:00 • committed by Kevin Wolf
parent c616f16e0c
commit f3e4ce4af3
5 changed files with 18 additions and 13 deletions
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5
block/commit.c
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@ -209,7 +209,8 @@ static void coroutine_fn commit_run(void *opaque)
s->common.offset += n * BDRV_SECTOR_SIZE;
if (copy && s->common.speed) {
delay_ns = ratelimit_calculate_delay(&s->limit, n);
delay_ns = ratelimit_calculate_delay(&s->limit,
n * BDRV_SECTOR_SIZE);
}
}
@ -231,7 +232,7 @@ static void commit_set_speed(BlockJob *job, int64_t speed, Error **errp)
error_setg(errp, QERR_INVALID_PARAMETER, "speed");
return;
}
ratelimit_set_speed(&s->limit, speed / BDRV_SECTOR_SIZE, SLICE_TIME);
ratelimit_set_speed(&s->limit, speed, SLICE_TIME);
}
static const BlockJobDriver commit_job_driver = {