Re: [PATCH] copy.c: use `sendfile()` for in-kernel file copying on Linux

From

Chris Torek <chris.torek@gmail.com>

Date

Feb 13, 2026, 15:36 UTC

Message-ID

<CAPx1GvfsnZiUkkXJSAtt4HECT6f+zb1+vtiT+UikcAq0WuFR8Q@mail.gmail.com>

In-Reply-To

<20260213124656.218396-1-integral@archlinux.org>

On Fri, Feb 13, 2026 at 4:47 AM George Hu <integral@archlinux.org> wrote:

> The `sendfile()` system call copies data between one file descriptor
> and another within the kernel, which is more efficient than the
> combination of `read()` and `write()`.

sendfile() is found on other systems (notably BSDs), so perhaps ...

> Signed-off-by: George Hu <integral@archlinux.org>
> ---
>  copy.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> diff --git a/copy.c b/copy.c
> index b668209b6c..d4b7cde764 100644
> --- a/copy.c
> +++ b/copy.c
> @@ -7,8 +7,23 @@
>  #include "strbuf.h"
>  #include "abspath.h"
>
> +#ifdef __linux__

Chris