Description of problem:

rbd map is taking more than 2 minutes to map the device on the node when there are 50 parallel requests

when have seen this behavior in ceph-csi


Version-Release number of selected component (if applicable): ceph 12.2.2


How reproducible:
Always

Steps to Reproduce:
1.create 50/100 rbd images
2. map 50 rbd images on the node (parallel request)

Actual results:

for some requests, rbd map is taking more than 2 minutes to map images on node

Expected results:

rbd map should be completed in few seconds even if there are N number for parallel requests

Additional info:

link to the upstream issue https://github.com/ceph/ceph-csi/issues/507
there is a discussion is going on in upstream, creating this bug to track the same.