shm: guard against pool destruction race condition #4256
| Job | Run time |
|---|---|
| 1m 50s | |
| 11s | |
| 2m 18s | |
| 59s | |
| 3m 11s | |
| 55s | |
| 43s | |
| 1m 52s | |
| 1m 1s | |
| 1m 19s | |
| 1m 40s | |
| 1m 8s | |
| 1m 7s | |
| 18m 14s |
| Job | Run time |
|---|---|
| 1m 50s | |
| 11s | |
| 2m 18s | |
| 59s | |
| 3m 11s | |
| 55s | |
| 43s | |
| 1m 52s | |
| 1m 1s | |
| 1m 19s | |
| 1m 40s | |
| 1m 8s | |
| 1m 7s | |
| 18m 14s |