static void iot_update_stats(struct io_tracker *t, struct bio *bio)
{
if (bio->bi_iter.bi_sector == from_oblock(t->last_end_oblock) + 1)
t->nr_seq_samples++;
else {
/*
* Just one non-sequential IO is enough to reset the
* counters.
*/
if (t->nr_seq_samples) {
t->nr_seq_samples = 0;
t->nr_rand_samples = 0;
}
t->nr_rand_samples++;
}
t->last_end_oblock = to_oblock(bio_end_sector(bio) - 1);
}
static dm_oblock_t to_hblock(struct smq_policy *mq, dm_oblock_t b)
{
sector_t r = from_oblock(b);
(void) sector_div(r, mq->cache_blocks_per_hotspot_block);
return to_oblock(r);
}