https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293489

--- Comment #3 from elephant <[email protected]> ---
I changed the readv call to pass only one iovec. Data was transferred but once
all data was exhausted and the cuse device returns zero bytes copied, the readv
call blocks indefinitely. This, I think is WAD since readv doesn't know when
new data will eventually become available.

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