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Is there a way to make fsync operations on Linux a no-op, ideally just for a single directory or mount point?

I am running some software which unfortunately I cannot modify which is doing excessive syncs. I don't care about robustness in the event of a system crash (we will re-format if that happens and start over).

I have looked through the mount options for xfs and ext4, and couldn't find anything that looked like it would make fsync a no-op.

I have also considered using tmpfs instead of a regular filesystem, and using the available disk as additional swap. I'm hoping for a neater option using a filesystem.

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If you don't care about your FS robuestness you can use the nobarrier mount option.

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