On 06/04/2020 22:09, Askar Safin wrote: > Hi. Thanks for your splice io_uring patch. Maybe it will be good idea to add uring operation, which will unify splice, sendfile and copy_file_range instead of just IORING_OP_SPLICE? It doesn't have to follow splice(2) semantics, so can be extended, in theory. Though I don't see much profit in doing that for now. sendfile(2) is done by splicing through an internal pipe, and this pipe will complicate things for io-wq (i.e. io_uring's thread pool). On the other hand, it'd be of the same performance and even more flexible to send 2 linked splice requests with a pre-allocated pipe from the userspace. -- Pavel Begunkov
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