You're being downvoted, and I suspect it's because you're not considering different workloads. There's an unfortunate amount of software that uses filesystem po

You're being downvoted, and I suspect it's because you're not considering different workloads. There's an unfortunate amount of software that uses filesystem polling as a crude form of IPC. Check every x seconds to see if a file at a certain path exists. Fast expiring these dentry nodes would hurt that workload.