Re: bpfilter causes a leftover kernel process

On Wed, Sep 5, 2018 at 5:05 PM Olivier Brunel [off-list ref] wrote:

You'll see in the end that systemd complains that it can't
unmount /oldroot (EBUSY), aka the root fs; and that's because of the
bpfilter helper, which wasn't killed because it's seen as a kernel
thread due to its empty command line and therefore not signaled.

thanks for tracking it down.
can somebody send a patch to give bpfilter non-empty cmdline?
I think that would be a better fix than tweaking all pid1s.