RFR: 8293004: (fs) FileChannel.transferXXX use of copy_file_range needs fallback handling for ENOSYS

[Brian Burkhalter]

On Sat, 27 Aug 2022 10:12:08 GMT, Florian Weimer <fweimer at openjdk.org> wrote:

> Now that the userspace emulation is not leveraged anymore, it would be possible to issue the system call directly for all glibc versions, but it's probably best not to start using `copy_file_range` where it hasn't been used before (the el7 kernel has a strange backport, if I recall correctly).

Marked as reviewed by bpb (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/10055