NFSv4 : Write delegations lead to unnecessary cache invalidations
Issue
Getting a write delegation from a NFS server can lead to unnecessary page cache invalidations on subsequent reads over the same file, this can lead to a performance impact, where data perfectly cached is retrieved instead from the wire
Environment
- RHEL6, RHEL7
- NFSv4.0, NFSv4.1
- A NFS server granting write delegations
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