s390/zcrypt: Fixed attrition of AP adapters and domains
Currently the first eligible AP adapter respectively domain will be
selected to service requests. In case of sequential workload, the
very same adapter/domain will be used.
The adapter/domain selection algorithm now considers the completed
transactions per adaper/domain and therefore ensures a homogeneous
utilization.
Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/crypto/ap_card.c b/drivers/s390/crypto/ap_card.c
index 731dc0d..0110d44 100644
--- a/drivers/s390/crypto/ap_card.c
+++ b/drivers/s390/crypto/ap_card.c
@@ -63,13 +63,11 @@ static ssize_t ap_request_count_show(struct device *dev,
char *buf)
{
struct ap_card *ac = to_ap_card(dev);
- struct ap_queue *aq;
unsigned int req_cnt;
req_cnt = 0;
spin_lock_bh(&ap_list_lock);
- for_each_ap_queue(aq, ac)
- req_cnt += aq->total_request_count;
+ req_cnt = atomic_read(&ac->total_request_count);
spin_unlock_bh(&ap_list_lock);
return snprintf(buf, PAGE_SIZE, "%d\n", req_cnt);
}