RFR: 8292562: (fc) Use copy_file_range in FileChannel::transferTo on Linux

[Alan Bateman]

On Fri, 19 Aug 2022 15:25:14 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Given https://bugs.openjdk.org/browse/JDK-4950302 I suppose the existing code(`sendfile`) will fail as well but I'll check.

I'm pretty sure that sendfile64 will succeed but copy_file_range will fail. It may be that we have to add test for this scenario.

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PR: https://git.openjdk.org/jdk/pull/9925