[Bug 1998308] Re: copy_file_range fails with EXDEV on copy to or from tmpfs

[Michael Hudson-Doyle]

Digging a bit suggests this is a result of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.18.y&id=b9cabd2ec2ff6f452bd5744326cc5c5f503448c6?
At any rate, not a glibc issue.

** Package changed: glibc (Ubuntu) => linux (Ubuntu)

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Title:
  copy_file_range fails with EXDEV on copy to or from tmpfs

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  copy_file_range(2) from ext4 to tmpfs fails.
  Same is true from tmpfs to ext4.

  gcc is already the newest version (4:11.2.0-1ubuntu1).
  libc6 is already the newest version (2.35-0ubuntu3.1).
  linux-image-lowlatency is already the newest version (5.15.0.53.48).

  See example program attached.

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