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I have two kernels: default 4.4.26 and 4.4.26 with this patch. What kind of test or benchmark should I run on my btrfs partition to see performance gain from applying the above-stated patch?

Nikita Gousak
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  • Presumably something like `cp -a src_dir new_dir_tree`, and then the same thing with a version of `cp` that uses copy_file_range instead of reading the source files itself. – Peter Cordes Oct 25 '16 at 03:40
  • It's a brand new syscall, so it doesn't speed up any existing code. You need user-space software that takes advantage of it. IDK if that's what you're asking. – Peter Cordes Oct 25 '16 at 03:40

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