RHEL8: "Duplicate cookie detected" when mounting a nfs share within a container

Solution In Progress - Updated -

Issue

When mounting a NFS share within a container we may get the following warnings on kernel message buffer, even if fscache option is not used:

[1035320.617187] FS-Cache: Duplicate cookie detected
[1035320.617486] FS-Cache: O-cookie c=00000000ddfbb56b [p=000000008ca522f8 fl=222 nc=0 na=1]
[1035320.617731] FS-Cache: O-cookie d=0000000056b6a9cf n=0000000031be0dbb
[1035320.617914] FS-Cache: O-key=[16] '040000000100000002000801ac1701e1'
[1035320.618121] FS-Cache: N-cookie c=000000009a29da58 [p=000000008ca522f8 fl=2 nc=0 na=1]
[1035320.618297] FS-Cache: N-cookie d=0000000056b6a9cf n=00000000934aeaee
[1035320.618482] FS-Cache: N-key=[16] '040000000100000002000801ac1701e1'

Environment

  • RHEL8
  • containers

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