Sure. In my case, I create an AKS cluster (which uses the Ubuntu 16
linux-azure image), install Rook v1.3.2, mount a CSI PVC volume, and
watch the logs fill up. That is rather heavy. I went back and asked the
ceph experts for a simpler reproduction testcase. Here goes:

# mount -t ceph <mon>:<port>:/ /mnt/ceph -o name=admin,secret=<my-secret>
# mkdir /mnt/ceph/quotadir
# setfattr -n ceph.quota.max_files -v 10 /mnt/ceph/quotadir
# umount /mnt/ceph
# mount -t ceph <mon>:<port>:/quotadir /mnt/ceph -o 
name=admin,secret=<my-secret> # <== Note the 'quotadir' here!!!
# touch /mnt/ceph/newfile

Prerequisite is a ceph cluster running, with a <mon>:<port> available to
mount on, and configured with csi secret.

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https://bugs.launchpad.net/bugs/1875884

Title:
  Kernel log flood "ceph: Failed to find inode for 1"

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