From: Collin Funk <collin.funk1@gmail•com>
To: Ed Maste <emaste@freebsd•org>
Cc: Chris Torek <chris.torek@gmail•com>,
George Hu <integral@archlinux•org>,
git@vger•kernel.org, Junio C Hamano <gitster@pobox•com>,
Johannes Schindelin <Johannes.Schindelin@gmx•de>
Subject: Re: [PATCH] copy.c: use `sendfile()` for in-kernel file copying on Linux
Date: Fri, 20 Feb 2026 08:48:55 -0800 [thread overview]
Message-ID: <87o6ljtl6w.fsf@gmail.com> (raw)
In-Reply-To: <CAPyFy2Dj6z9OuYFF9Tpn98mrd3Hs6BD75B73B+jkqp9aVM8X_w@mail.gmail.com>
Ed Maste <emaste@freebsd•org> writes:
> On Sat, 14 Feb 2026 at 11:50, Chris Torek <chris.torek@gmail•com> wrote:
>>
>> Ah, more importantly, FreeBSD's sendfile only operates on sockets.
>
> True. If benchmarking shows this is profitable then we'd want to use
> copy_file_range(2) on FreeBSD.
We use copy_file_range in GNU Coreutils. Note that it has quite a few
issues [1], including a recent one affecting files larger than INT_MAX
bytes [2][3].
Coreutils has Gnulib to work around this stuff, and the performance
improvement is meaningful for 'cp'. Based on earlier messages in this
thread, I am not sure if it is worth dealing with in this case.
Collin
[1] https://lwn.net/Articles/789527/
[2] https://sourceware.org/PR33245
[3] https://bugs.gnu.org/79139
next prev parent reply other threads:[~2026-02-20 16:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-13 12:46 [PATCH] copy.c: use `sendfile()` for in-kernel file copying on Linux George Hu
2026-02-13 15:36 ` Chris Torek
2026-02-14 9:21 ` George Hu
2026-02-14 16:50 ` Chris Torek
2026-02-20 16:35 ` Ed Maste
2026-02-20 16:48 ` Collin Funk [this message]
2026-02-14 16:43 ` Phillip Wood
2026-02-15 6:23 ` George Hu
2026-02-15 7:43 ` Jeff King
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