GNU bug report logs - #63850
cp fails for files > 2 GB if copy offload is unsupported

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Package: coreutils;

Reported by: Sam James <sam <at> gentoo.org>

Date: Fri, 2 Jun 2023 15:50:02 UTC

Severity: normal

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Sam James <sam <at> gentoo.org>
Cc: 63850 <at> debbugs.gnu.org, P <at> draigbrady.com, floppym <at> gentoo.org
Subject: bug#63850: cp fails for files > 2 GB if copy offload is unsupported
Date: Mon, 5 Jun 2023 22:48:27 -0700

On 2023-06-05 22:26, Sam James wrote:
> It's just that linux-headers is
> a special case

Indeed it is. And apparently glibc avoids the copy_file_range bugs by 
never, ever using copy_file_range internally - which explains why glibc 
hasn't run into this backward compatibility issue. Presumably once glibc 
starts assuming kernel 5.3 or later, it can start using copy_file_range 
internally.

Anyway, thanks for explaining. I installed the patch I mentioned into 
Gnulib and have updated coreutils accordingly on Savannah master. Please 
give it a try.
This bug report was last modified 2 years and 41 days ago.

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