dmesg complains about missing obscure flags for memfd_create

sigra · Tux's lil' helper Joined: 03 Feb 2006 Posts: 124

Why does dmesg complain about missing obscure flags for memfd_create that are not even in the manual?

salahx · Guru Joined: 12 Mar 2005 Posts: 534

This is intentional. The original memfd_create syscall created executable memory by default, rather than make the caller opt in.

See https://lore.kernel.org/lkml/20221207154939.2532830-1-jeffxu@google.com/ for the use of these flags.

You can safely ignore it if you are not a developer maintaining a program that uses memfd_create.