The 0.11.8 driver takes a long time to take a snapshot

[yito24]

It is slow to take snapshots of 0.11.8 in RHEL8. For 0.11.6, it takes about 0.361 seconds to snapshot 4 volumes. 0.11.6.txt

For 0.11.8, it takes about 12 seconds to snapshot 4 volumes. 0.11.8.txt lsblk.txt

In the case of CentOS7, taking a snapshot takes a very long time. This symptom is very noticeable. For 0.11.6, it takes about 4.174 seconds to snapshot 4 volumes. 0.11.6_el7.txt

For 0.11.8, it takes about 02:18.064 seconds to snapshot 4 volumes. 0.11.8_el7.txt lsblk_el7.txt

I have registered with the same information in the past, but I think this issue is important. https://github.com/datto/dattobd/issues/373