On Wed, Sep 30, 2015 at 11:13 AM, Tycho Andersen
[off-list ref] wrote:

This command allows comparing the underling private data of two fds. This
is useful e.g. to find out if a seccomp filter is inherited, since struct
seccomp_filter are unique across tasks and are the private_data seccomp
fds.

This is very implementation-specific and may have nasty ABI
consequences far outside seccomp.  Let's do something specific to
seccomp and/or eBPF.

--Andy