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blk-iolatency: don't change the latency window 

Early versions of these patches had us waiting for seconds at a time
during submission, so we had to adjust the timing window we monitored
for latency.  Now we don't do things like that so this is unnecessary
code.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
hifive-unleashed-5.1
Josef Bacik 2018-07-16 12:12:22 -04:00 committed by Jens Axboe
parent f6352103d2
commit d607eefa3b
1 changed files with 0 additions and 10 deletions
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10
block/blk-iolatency.c
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@ -468,16 +468,6 @@ static void iolatency_check_latencies(struct iolatency_grp *iolat, u64 now)
}
preempt_enable();
/*
* Our average exceeded our window, scale up our window so we are more
* accurate, but not more than the global timer.
*/
if (stat.mean > iolat->cur_win_nsec) {
iolat->cur_win_nsec <<= 1;
iolat->cur_win_nsec =
max_t(u64, iolat->cur_win_nsec, NSEC_PER_SEC);
}
parent = blkg_to_lat(blkg->parent);
if (!parent)
return;