Tried to reproduce it manually with autotest on Oracle VM.DenseIO2.8, Focal v5.8, but everything worked fine. However when scheduled a test build it failed there as usual on Oracle VM.DenseIO2.8:
16:07:14 DEBUG| [stdout] /opt/ltp/testcases/bin/zram02.sh: 29: echo: echo: I/O error
...
16:07:14 DEBUG| [stdout] zram03 1 TBROK : zram03.c:87: Failed to close FILE '/sys/block/zram0/disksize': errno=EBUSY(16): Device or resource busy
Tried to reproduce it manually with autotest on Oracle VM.DenseIO2.8, Focal v5.8, but everything worked fine. However when scheduled a test build it failed there as usual on Oracle VM.DenseIO2.8: testcases/ bin/zram02. sh: 29: echo: echo: I/O error zram0/disksize' : errno=EBUSY(16): Device or resource busy
16:07:14 DEBUG| [stdout] /opt/ltp/
...
16:07:14 DEBUG| [stdout] zram03 1 TBROK : zram03.c:87: Failed to close FILE '/sys/block/