Commit 7d8d0014 authored by Omar Sandoval's avatar Omar Sandoval Committed by Jens Axboe

blk-stat: fix blk_stat_sum() if all samples are batched

We need to flush the batch _before_ we check the number of samples,
otherwise we'll miss all of the batched samples.

Fixes: cf43e6be ("block: add scalable completion tracking of requests")
Signed-off-by: default avatarOmar Sandoval <osandov@fb.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 97da3854
...@@ -30,11 +30,11 @@ static void blk_stat_flush_batch(struct blk_rq_stat *stat) ...@@ -30,11 +30,11 @@ static void blk_stat_flush_batch(struct blk_rq_stat *stat)
static void blk_stat_sum(struct blk_rq_stat *dst, struct blk_rq_stat *src) static void blk_stat_sum(struct blk_rq_stat *dst, struct blk_rq_stat *src)
{ {
blk_stat_flush_batch(src);
if (!src->nr_samples) if (!src->nr_samples)
return; return;
blk_stat_flush_batch(src);
dst->min = min(dst->min, src->min); dst->min = min(dst->min, src->min);
dst->max = max(dst->max, src->max); dst->max = max(dst->max, src->max);
......
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