specialize io::copy to use copy_file_range, splice or sendfile - #75272

Merged

bors merged 13 commits into

rust-lang:masterfrom

the8472:spec-copy

Nov 14, 2020

Commits on Nov 13, 2020

specialize io::copy to use copy_file_range, splice or sendfile
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1623647
hide unused exports on other platforms
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5eb88fa
move tests module into separate file
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67a6059
prioritize sendfile over splice since it results in fewer context switches when sending to pipes
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cd3bddc
add forwarding specializations for &mut variants
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0624730
reduce syscalls by inferring FD types based on source struct instead of calling stat()
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46e7fbe
add benchmarks
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ad9b07c
move copy specialization into sys::unix module
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7f5d272
move copy specialization tests to their own module
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18bfe2a
limit visibility of copy offload helpers to sys::unix module
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888b103
move sendfile/splice/copy_file_range into kernel_copy module
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3dfc377
do direct splice syscall and probe availability to get android builds to work
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4854d41
Always handle EOVERFLOW by falling back to the generic copy loop
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bbfa92c