| commit | 20f50bba49e6338793a5711dc1c6ed60e4b10df8 | [log] [tgz] |
|---|---|---|
| author | Tobias Klauser <tklauser@distanz.ch> | Mon Nov 09 11:25:38 2020 +0100 |
| committer | Dmitri Shuralyov <dmitshur@golang.org> | Fri Nov 20 21:54:27 2020 +0000 |
| tree | 9840852e4e7783d567492fc51ca507aca18df968 | |
| parent | efd204ccf78e16ee6792079ba70456ed425cb9c3 [diff] |
[release-branch.go1.15] internal/poll: use copy_file_range only on Linux kernel >= 5.3 https://man7.org/linux/man-pages/man2/copy_file_range.2.html#VERSIONS states: A major rework of the kernel implementation occurred in 5.3. Areas of the API that weren't clearly defined were clarified and the API bounds are much more strictly checked than on earlier kernels. Applications should target the behaviour and requirements of 5.3 kernels. Rather than attempting to detect the file system for source and destination files (which means two additional statfs syscalls) and skip copy_file_range in case of known defects (e.g. CIFS -> CIFS), just assume copy_file_range to be broken on kernels < 5.3. Fixes #42550 Change-Id: I3a531296182c1d6e341772cc9d2be5bf83e52575 Reviewed-on: https://go-review.googlesource.com/c/go/+/268338 Trust: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> (cherry picked from commit 1c7650aa93bd53b7df0bbb34693fc5a16d9f67af) Reviewed-on: https://go-review.googlesource.com/c/go/+/269759 Trust: Ian Lance Taylor <iant@golang.org> Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
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