kvm: do not add disk cache mode from an empty string #16330
| Job | Run time |
|---|---|
| 38m 56s | |
| 48m 49s | |
| 34m 57s | |
| 40m 26s | |
| 36m 3s | |
| 43m 58s | |
| 50m 20s | |
| 38m 55s | |
| 34m 52s | |
| 1h 3m 17s | |
| 59m 42s | |
| 45m 53s | |
| 50m 4s | |
| 38m 58s | |
| 1h 20m 53s | |
| 34m 0s | |
| 18m 56s | |
| 12h 38m 59s |
| Job | Run time |
|---|---|
| 38m 56s | |
| 48m 49s | |
| 34m 57s | |
| 40m 26s | |
| 36m 3s | |
| 43m 58s | |
| 50m 20s | |
| 38m 55s | |
| 34m 52s | |
| 1h 3m 17s | |
| 59m 42s | |
| 45m 53s | |
| 50m 4s | |
| 38m 58s | |
| 1h 20m 53s | |
| 34m 0s | |
| 18m 56s | |
| 12h 38m 59s |