On Sun, May 7, 2023 at 10:23 AM Jeffrey Walton <noloa...@gmail.com> wrote: > This may be related... I seem to recall the GNUlib folks talking about > a cp bug on sparse files. It looks like it may be fixed in coreutils > release 9.2 (2023-03-20): > https://github.com/coreutils/coreutils/blob/master/NEWS#L233 > > If I recall correctly, it had something to do with the way > copy_file_range worked. (Or maybe, it did not work as expected). > > According to the GNUlib docs > (https://www.gnu.org/software/gnulib/manual/html_node/copy_005ffile_005frange.html): > > This function has many problems on Linux > kernel versions before 5.3
That's quite interesting, thanks (we've been talking about making direct use of copy_file_range() in a few threads, I'll definitely be looking into that history), but we don't currently use copy_file_range() or any coreutils stuff in the relevant code paths here -- this data is copied by plain old pread() and pwrite().
